Awesome C++

A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff.

• Awesome C++
  • Standard Libraries
  • Frameworks
  • Artificial Intelligence
  • Asynchronous Event Loop
  • Audio
  • Biology
  • BitTorrent
  • Chemistry
  • CLI
  • Compression
  • Concurrency
  • Configuration
  • Containers
  • Cryptography
  • CSV
  • Database
  • Data visualization
  • Debug
  • Documentation
  • DSP
  • Font
  • Game Engine
  • Graph
  • GUI
  • Graphics
  • Image Processing
  • Internationalization
  • Inter-process communication
  • JSON
  • Logging
  • Machine Learning
  • Math
  • Memory Allocation
  • Multimedia
  • Networking
  • Office Open XML
  • PDF
  • Physics
  • Reflection
  • Regular Expression
  • Robotics
  • Scientific Computing
  • Scripting
  • Serialization
  • Serial Port
  • Sorting
  • Video
  • Virtual Machines
  • Web Application Framework
  • XML
  • Yaml
  • Miscellaneous
• Software
  • Compiler
  • Online Compiler
  • Debugger
  • Integrated Development Environment
  • Build Systems
  • Static Code Analysis
  • Coding Style Tools
• Resources
  • API Design
  • Articles
  • Books
  • Coding Standards
  • Coding Style
  • Podcasts
  • Talks
  • Videos
  • Websites
  • Weblogs
  • Other Awesome Projects
• Other Awesome Lists
• Jobs
• Sponsors
• Contributing - If you see a project or link here that is no longer maintained or is not a good fit, please submit a pull request to improve this document. Thank you!

Standard Libraries

C++ Standard Library - including STL Containers, STL Algorithm, STL Functional, etc.

• 🌎 C++ Standard Library - A collection of classes and functions, which are written in the core language and part of the C++ ISO Standard itself.
• 🌎 Standard Template Library - The Standard Template Library (STL).
• 🌎 C POSIX library - A specification of a C standard library for POSIX systems.
• ISO C++ Standards Committee - ISO/IEC JTC1/SC22/WG21 - The C++ Standards Committee. website
• 🌎 The GNU C Library - The purpose of this manual is to tell you how to use the facilities of the GNU C Library.

Frameworks

C++ generic frameworks and libraries.

•  16274⭐   2835🍴 abseil-cpp) - Abseil C++ Common Libraries. [Apache2]
• Apache C++ Standard Library - STDCXX, A collection of algorithms, containers, iterators, and other fundamental components. [retired] [Apache2]
• APR - Apache Portable Runtime. Another library of cross-platform utility functions. [Apache2]
• ASL - Adobe Source Libraries provides peer-reviewed and portable C++ source libraries. [MIT]
•    392⭐     32🍴 AUI) - Declarative UI toolkit for C++20. [MPL2]
• Boost ⚡ - A large collection of generic C++ libraries. [Boost] 🌎 website
•   1748⭐    325🍴 BDE) - The BDE Development Environment from Bloomberg Labs. [Apache2]
•  14005⭐   2528🍴 C++ Workflow) ⚡ - C++ Parallel Computing and Asynchronous Networking Engine. [Apache2]
•   2103⭐    367🍴 CGraph) - A cross-platform DAG framework based on C++ without any 3rd-party. [MIT]
• 🌎 Cinder - A community-developed, free and open source library for professional-quality creative coding. [BSD]
•   4149⭐    578🍴 Coost) - A tiny boost library in C++11. [MIT]
• Cxxomfort - A small, header-only library that backports various facilities from more recent C++ Standards to C++03 and later. [MIT]
•  14121⭐   3442🍴 Dlib) ⚡ - A toolkit for making real world machine learning and data analysis applications in C++. [Boost] website
•   8907⭐    993🍴 EASTL) - Electronic Arts Standard Template Library. [BSD]
•   2615⭐    459🍴 ETL) - Embedded Template Library. [MIT]
•    733⭐    149🍴 ffead-cpp) - Framework for Enterprise Application Development. [Apache2]
•  29723⭐   5761🍴 Folly) - An open-source C++ library developed and used at Facebook. [Apache2]
•   2226⭐    177🍴 FunctionalPlus) - Functional Programming Library for C++. Write concise and readable C++ code. [MIT]
• 🌎 GLib - GLib provides the core application building blocks for libraries and applications written in C. [LGPL]
•    192⭐     15🍴 itlib) - A collection of std-like single-header C++ libraries [MIT]
•   7513⭐   1878🍴 JUCE) - An all-encompassing C++ class library for developing cross-platform software. [Core-Module: ISC, Rest: GPL2/GPL3/Proprietary] website
•     87⭐     24🍴 Kigs framework) - A free and open source C++ modular multi-purpose cross platform RAD framework. [MIT] 🌎 website
•   1665⭐    360🍴 libPhenom) - libPhenom is an eventing framework for building high performance and high scalability systems in C. [Apache2]
•   1346⭐    351🍴 LibSourcey) - C++11 evented IO for real-time video streaming and high performance networking applications. [LGPL]
•    451⭐     97🍴 LibU) - A multiplatform utility library written in C. [BSD]
•     64⭐      9🍴 libxutils) - Simple and yet powerful cross-platform C library providing data structures, algorithms and much more. [MIT]
• Loki - A C++ library of designs, containing flexible implementations of common design patterns and idioms. [MIT]
•     40⭐      8🍴 MiLi) - Minimal headers-only C++ Library. [Boost]
•  10211⭐   2569🍴 OpenFrameworks) - A cross platform open source toolkit for creative coding in C++. [MIT] website
•   1069⭐    147🍴 PhotonLibOS) - A comprehensive C++ framework featuring efficient user-space threading (coroutine with work-stealing), I/O, networking, RPC, HTTP, etc., and used extensively in Alibaba. It is compatible with C++ 14/17/20/23, Linux, MacOS, x86-64, ARM64, gcc and clang. [Apache2] 🌎 website
• Qt ⚡ - A cross-platform application and UI framework. [GPL/LGPL/Proprietary] 🌎 website
• Reason - A cross platform framework designed to bring the ease of use of Java, .Net, or Python to developers who require the performance and strength of C++. [GPL2]
• 🌎 ROOT - A set of OO frameworks with all the functionality needed to handle and analyze large amounts of data in a very efficient way. Used at CERN. [LGPL]
•    199⭐      5🍴 rpp) - Minimal Rust-inspired C++20 STL replacement. [MIT]
•    588⭐     16🍴 SaneCppLibraries) - a set of C++ platform abstraction libraries for macOS, Windows and Linux. [MIT] 🌎 website
•   8821⭐   1633🍴 Seastar) - An advanced, open-source C++ framework for high-performance server applications on modern hardware. [Apache-2.0 License] seastar.io
•   1111⭐    150🍴 Siv3D) - Siv3D (OpenSiv3D) is a C++20 framework for creative coding (2D/3D games, media art, visualizers, and simulators). [MIT] 🌎 website
• STLport - An exemplary version of STL. [Free]
• STXXL - Standard Template Library for Extra Large Data Sets. [Boost]
•   5029⭐    753🍴 tbox) - A glib-like multi-platform c library. [Apache2] website
• Ultimate++ - A C++ cross-platform rapid application development framework. [BSD]
• Windows Template Library - A C++ library for developing Windows applications and UI components. [Public]
•   1051⭐     70🍴 xtd) - Modern C++20 framework to create console (CLI), forms (GUI) and unit tests (xUnit) applications on Windows, macOS, Linux, iOS, Android, FreeBSD and Haiku. [MIT]
•    375⭐     21🍴 Yomm2) - Fast, Orthogonal, Open multi-methods. Supersedes    117⭐     16🍴 Yomm11) [Boost]

Artificial Intelligence

•    109⭐     20🍴 ANNetGPGPU) - A GPU (CUDA) based Artificial Neural Network library. [LGPL]
•    476⭐    128🍴 btsk) - Game Behavior Tree Starter Kit. [zlib]
• Evolving Objects - A template-based, ANSI-C++ evolutionary computation library which helps you to write your own stochastic optimization algorithms insanely fast. [LGPL]
•   1111⭐    239🍴 frugally-deep) - Header-only library for using Keras models in C++. [MIT]
•   2185⭐    260🍴 Genann) - Simple neural network library in C. [zlib]
•  20825⭐   6756🍴 MXNet) - Lightweight, Portable, Flexible Distributed/Mobile Deep Learning with Dynamic, Mutation-aware Dataflow Dep Scheduler; for Python, R, Julia, Scala, Go, JavaScript and more. 🌎 website
•  92768⭐  25121🍴 PyTorch) - Tensors and Dynamic neural networks in Python with strong GPU acceleration. 🌎 website
•   5405⭐    499🍴 flashlight) - Flashlight is a fast, flexible machine learning library written entirely in C++. [BSD]
•   7249⭐   1706🍴 Recast/Detour) - (3D) Navigation mesh generator and pathfinder, mostly for games. [zlib]
• 191382⭐  74808🍴 TensorFlow) - An open source software library for numerical computation using data flow graphs. [Apache]
•     51⭐      4🍴 Txeo) - A modern C++ wrapper for TensorFlow. [Apache]
•   3874⭐   1066🍴 oneDNN) - An open-source cross-platform performance library for deep learning applications. [Apache] 🌎 website
•  17588⭐   4267🍴 CNTK) - Microsoft Cognitive Toolkit (CNTK), an open source deep-learning toolkit. [Boost]
•   5970⭐   1391🍴 tiny-dnn) - A header only, dependency-free deep learning framework in C++11. [BSD]
•    913⭐    179🍴 Veles) - Distributed platform for rapid Deep learning application development. [Apache]
•  15080⭐   5366🍴 Kaldi) - Toolkit for speech recognition. [Apache]

Asynchronous Event Loop

•      ?⭐      ?🍴 Asio) - A cross-platform C++ library for network and low-level I/O programming that provides developers with a consistent asynchronous model using a modern C++ approach. [Boost] website
•   1422⭐    446🍴 Boost.Asio) - A cross-platform C++ library for network and low-level I/O programming. [Boost] 🌎 website
•   3323⭐    559🍴 C++ Actor Framework) - An Open Source Implementation of the Actor Model in C++. [BSD-3-Clause] website
•    227⭐     14🍴 Ichor) - An event queue which focuses on thread safety and provides dependency injection. [MIT]
• libev - A full-featured and high-performance event loop that is loosely modelled after libevent, but without its limitations and bugs. [BSD and GPL]
• libevent - An event notification library. [BSD]
•   7306⭐   1316🍴 libhv) - Cross-platform event loop library. [BSD]
•  25730⭐   3745🍴 libuv) - Cross-platform asynchronous I/O. [BSD]
•    693⭐     95🍴 promise-cpp) - Header only library that implements Promise/A+ standard. [Anti-996]
•   1972⭐    222🍴 uvw) - C++ wrapper for libuv. [MIT]
•    826⭐    215🍴 uv-cpp) - a simple interface, high-performance network library based on C++11. [MIT]

Audio

Audio, Sound, Music, Digitized Voice Libraries

•     57⭐      5🍴 Amplitude Audio SDK) - A cross-platform audio engine designed with the needs of games in mind. [Apache-2.0] 🌎 website
•   3509⭐    394🍴 Aubio) - A library for audio and music analysis.[GPL-3.0] 🌎 website
•   1071⭐    215🍴 AudioFile) - A simple C++ library for reading and writing audio files. [MIT]
•   3149⭐    144🍴 audioFlux) - A C library for audio and music analysis, feature extraction. [MIT]
•   1506⭐    224🍴 dr_libs) - Single file audio decoding libraries for C and C++. [Unlicense]
• FMOD - An easy to use crossplatform audio engine and audio content creation tool for games. [Free for non-commercial/Commercial]
• 🌎 KFR - Fast, modern C++ DSP framework, FFT, FIR/IIR filters, Sample Rate Conversion. [GPL/Proprietary]
• 🌎 LAME - LAME is a high quality MPEG Audio Layer III (MP3) encoder. [LGPL]
•      ?⭐      ?🍴 libsndfile) - C library with C++ wrapper for reading and writing files containing sampled sound through one standard library interface. [LGPL-2.1] website
•   2027⭐    248🍴 libsoundio) - C library for cross-platform real-time audio input and output. [MIT] website
•   1641⭐    285🍴 Maximilian) - C++ Audio and Music DSP Library. [MIT]
• OpenAL - Open Audio Library - A crossplatform audio API. [BSD/LGPL/Proprietary]
•   4973⭐    446🍴 miniaudio) - Single file audio playback and capture library. [Unlicense] 🌎 website
•    251⭐     37🍴 ni-media) - C++ library for reading and writing audio files. [MIT]
• Opus - A totally open, royalty-free, highly versatile audio codec. [BSD]
• PortAudio - PortAudio is a free, cross-platform, open-source, audio I/O library. [MIT]
•   4961⭐    984🍴 rnnoise) - Recurrent neural network for audio noise reduction. [BSD-3-Clause]
•    215⭐     24🍴 SELA) - SimplE Lossless Audio. [MIT]
•   2001⭐    315🍴 SoLoud) - Easy, portable audio engine for games. [zlib]
• Speex - A free codec for free speech. Obsoleted by Opus. [BSD]
•    545⭐     69🍴 Tonic) - Easy and efficient audio synthesis in C++. [Unlicense]
• Vorbis - Ogg Vorbis is a fully open, non-proprietary, patent-and-royalty-free, general-purpose compressed audio format. [BSD]
•   1767⭐    233🍴 minimp3) - Public domain, header-only MP3 decoder with clean-room implementation. [CC0]
•    766⭐    196🍴 Verovio) - Verovio is a fast and lightweight music notation engraving library. [LGPL] 🌎 website
•      ?⭐      ?🍴 Wav2Letter++) - Public domain, a fast open source speech processing toolkit written entirely in C++ and uses the ArrayFire tensor library and the flashlight machine learning library for maximum efficiency. [BSD]

Biology

Bioinformatics, Genomics, Biotech

• BioC++ - C++ Computational Libraries for Bioinformatics. [BSD]
• Chaste - An open source C++ library for the computational simulation of mathematical models developed for physiology and biology. [BSD]
• libsequence - A C++ library for representing and analyzing population genetics data. [GPL]
• SeqAn - Algorithms and data structures for the analysis of sequences with the focus on biological data. [BSD/3-clause]
•    654⭐    224🍴 Vcflib) - A C++ library for parsing and manipulating VCF files. [MIT]
•    109⭐     27🍴 Wham) - Structural variants (SVs) in Genomes by directly applying association tests to BAM files. [MIT]

BitTorrent

•    703⭐    169🍴 jech/dht) - BitTorrent DHT library in C. [MIT]
•   5663⭐   1048🍴 libtorrent) (a.k.a. libtorrent-rasterbar) - An efficient feature complete C++ bittorrent implementation. [BSD]
•    931⭐    220🍴 LibTorrent) (a.k.a. libtorrent-rakshasa) - BitTorrent library. [GPL]
•   1145⭐    264🍴 libutp) - uTorrent Transport Protocol library. [MIT]

Chemistry

Chemistry, Quantum Chemistry, Solid-State Chemistry/Physics, Geochemistry, Biochemistry

•     40⭐     10🍴 d-SEAMS) - A molecular dynamics trajectory analysis engine in C++ and Lua with Nix. It is an acronym for Deferred Structural Elucidation Analysis for Molecular Simulations. [GPL] 🌎 website
•    804⭐    359🍴 gromacs) - A message-passing parallel molecular dynamics implementation. [GPL] website
•    194⭐     65🍴 Reaktoro) - A computational framework in C++ and Python for modeling chemically reactive systems. [LGPL] 🌎 website
•   2576⭐   1861🍴 LAMMPS) - A classical molecular dynamics code with a focus on materials modeling. It's an acronym for Large-scale Atomic/Molecular Massively Parallel Simulator. [GPL] 🌎 website
•    208⭐     69🍴 MADNESS) - Multiresolution Adaptive Numerical Environment for Scientific Simulation. [GPL]    208⭐     69🍴 website)
•     72⭐     25🍴 MPQC) - The Massively Parallel Quantum Chemistry program, MPQC, computes properties of atoms and molecules from first principles using the time independent Schrödinger equation. [GPL] 🌎 website
•   1078⭐    465🍴 Psi) - An ab initio computational chemistry package. [GPL] 🌎 website

CLI

Console/Terminal User Interface, Command Line Interface

•   1396⭐     97🍴 Argh!) - A minimalist, frustration-free, header-only argument handler. [BSD]
•   3202⭐    279🍴 argparse) - Argument Parser for Modern C++. [MIT]
•   1554⭐    171🍴 args) - A simple header-only C++ argument parser library. [MIT]
•     17⭐      1🍴 Argy) - Command-Line Argument Parsing Library for Modern C++ — Simple, Intuitive, and Header-only with Zero Dependencies [MIT]
•    198⭐      2🍴 barkeep) - Small C++ header to display async animations, counters, and progress bars. [Apache-2.0] 🌎 website
•    122⭐    115🍴 Boost.Program_options) - A library to obtain program options via conventional methods such as command line and config file. [Boost] 🌎 website
•   1310⭐    149🍴 cli) - A cross-platform header only C++14 library for interactive command line interfaces (Cisco style). [Boost]
•   3814⭐    384🍴 CLI11) - Header only single or multi-file C++11 library for simple and advanced CLI parsing. [BSD]
•   1278⭐    156🍴 clipp) - Easy to use, powerful and expressive command line argument handling for C++11/14/17 contained in a single header file. [MIT]
•    601⭐     64🍴 cpp-terminal) - Small header only C++ library for writing multiplatform terminal applications. [MIT]
•     26⭐      5🍴 Ctrl+C) - Crossplatform C++11 library to handle Ctrl+C event in custom functions. [MIT]
•   4546⭐    617🍴 cxxopts) - Lightweight C++ command line option parser. [MIT]
•   1074⭐    146🍴 docopt.cpp) - A library to generate option parser from docstring. [MIT/Boost]
•   1099⭐     54🍴 FINAL CUT) - Library for creating terminal applications with text-based widgets. [LGPL]
•   8681⭐    499🍴 FTXUI) - C++ Functional Terminal User Interface. [MIT]
• 🌎 gflags - Commandline flags module for C++. [BSD]
•   3351⭐    143🍴 imtui) - Immediate Mode Text-based User Interface. [MIT]
•      ?⭐      ?🍴 indicators) - Activity indicators for Modern C++. [MIT]
•   4035⭐    692🍴 linenoise) - A small self-contained alternative to readline and libedit. [BSD-2-Clause]
•    364⭐     55🍴 linenoise-ng) - A small, portable GNU readline replacement for Linux, Windows and MacOS which is capable of handling UTF-8 characters. [BSD]
•    542⭐     66🍴 Lyra) - A simple to use, composable, command line parser for C++ 11 and beyond. [Boost]
• Ncurses - A terminal user interface. [MIT]
•    848⭐     39🍴 oof) - Convenient, high-performance RGB color and position control for console output. [MIT]
•   1184⭐    198🍴 PDCurses) - Public domain curses library with both source code and pre-compiled library available. [PublicDomain]
•    178⭐     32🍴 popl) - A single-header templated command line arguments and ini file parser for C++ 11 and beyond. [MIT]
•    718⭐    119🍴 replxx) - A readline and libedit replacement that supports UTF-8, syntax highlighting, hints, works on Unix and Windows. [BSD]
•   2083⭐    150🍴 tabulate) - Table Maker for Modern C++. [MIT]
• TCLAP - A mature, stable and feature-rich library for defining and accessing command line arguments in ANSI C++. [MIT]
•   1999⭐    190🍴 termbox) - A C library for writing text-based user interfaces. [MIT]
•    757⭐     53🍴 TermOx) - C++17 Terminal User Interface(TUI) Library. [MIT]
•    220⭐     11🍴 tuibox) - A single-header terminal UI (TUI) library, capable of creating mouse-driven, interactive applications on the command line. [MIT]

Compression

Compression and Archiving Libraries

•    747⭐    132🍴 bit7z) - A C++ static library offering a clean and simple interface to the 7-zip shared libraries. [MPL2]
•  14262⭐   1281🍴 Brotli) - Brotli compression format. Developed by Google. [MIT]
• bzip2 - A freely available, patent free, high-quality data compressor. [BSD]
•   1047⭐     53🍴 bzip3) - A better and stronger spiritual successor to BZip2. [LGPL]
•    501⭐     98🍴 FastLZ) - Small & portable byte-aligned LZ77 compression. [MIT]
•   1417⭐    151🍴 FiniteStateEntropy) - New generation entropy codecs : Finite State Entropy and Huff0.
•   1464⭐    207🍴 heatshrink) - data compression library for embedded/real-time systems [ISC]
•    171⭐      5🍴 Kanzi) - a modern, modular, portable and efficient lossless data compressor implemented in C++. [Apache-2.0]
• 🌎 KArchive - A library for creating, reading, writing and manipulating file archives like zip and tar. It also provides transparent compression and decompression of data, using formats like gzip, via a subclass of QIODevice. [LGPL]
•   3287⭐    826🍴 libarchive) - Multi-format archive and compression library. [New BSD] website
•  11265⭐   1458🍴 LZ4) - Extremely Fast Compression algorithm. [BSD] website
•   1807⭐    182🍴 LZFSE) - LZFSE compression library and command line tool. Developed by Apple.
• 🌎 LZHAM - Lossless data compression library with a compression ratio similar to LZMA but with much faster decompression. [BSD]
• 🌎 LZMA ⚡ - The default and general compression method of 7z format. [PublicDomain] 🌎 website
• LZMAT - An extremely fast real-time lossless data compression library. [GPL]
•   2471⭐    367🍴 miniz) - Single C source file Deflate/Inflate compression library with zlib-compatible API, ZIP archive reading/writing, PNG writing. [MIT]
•   1380⭐    467🍴 Minizip) - Zlib with latest bug fixes that supports PKWARE disk spanning, AES encryption, and IO buffering. [zlib]
•   1380⭐    467🍴 minizip-ng) - Fork of the popular zip manipulation library found in the zlib distribution. [zlib]
• 🌎 PhysicsFS - A library to provide abstract access to various archives. It is intended for use in video games, and the design was somewhat inspired by Quake 3's file subsystem. [zlib]
•    429⭐     12🍴 Rapidgzip) - Gzip Decompression and Random Access for Modern Multi-Core Machines. [Apache-2/MIT]
•   1200⭐    133🍴 smaz) - Small strings compression library. [BSD]
• 🌎 Snappy - A fast compressor/decompressor. [BSD]
• ZLib - A very compact compression library for data streams. [zlib]
•   1841⭐    307🍴 zlib-ng) - zlib for the "next generation" systems. Drop-In replacement with some serious optimizations. [zlib]
•  25549⭐   2301🍴 zstd) - Zstandard - Fast real-time compression algorithm. Developed by Facebook. [BSD]
• ZZIPlib - Provides read access on ZIP-archives. [MPL/LGPL]

Concurrency

Concurrency and Multithreading

•      4⭐      0🍴 alpaka) - Abstraction library for parallel kernel acceleration. [LGPLv3+]
•   4771⭐    548🍴 ArrayFire) - A general purpose GPU library. [BSD]
•   1405⭐    203🍴 Async++) - A lightweight concurrency framework for C++11, inspired by the Microsoft PPL library and the N3428 C++ standard proposal. [MIT]
•   1624⭐    338🍴 Boost.Compute) - A C++ GPU Computing Library for OpenCL. [Boost] 🌎 website
•    374⭐     64🍴 Bolt) - A C++ template library optimized for GPUs. [Apache2]
•   2641⭐    286🍴 BS::thread_pool) - A fast, lightweight, and easy-to-use C++17 thread pool library [MIT]
•    553⭐     38🍴 Channel) - Thread-safe container for sharing data between threads. [MIT]
•   2541⭐    328🍴 ck) - Concurrency primitives, safe memory reclamation mechanisms and non-blocking data structures. [BSD]
•  11445⭐   1817🍴 concurrentqueue) - A fast multi-producer, multi-consumer lock-free concurrent queue for C++11. [BSD,Boost]
•    328⭐      8🍴 Coros) - An easy-to-use and fast library for task-based parallelism, utilizing coroutines. [BSL-1.0]
•     84⭐     50🍴 CUB) - CUB provides state-of-the-art, reusable software components for every layer of the CUDA programming mode. [New BSD]
•    856⭐     86🍴 cuda-api-wrappers) - Lightweight, Modern-C++ wrappers for the CUDA GPU programming runtime API. [BSD]
•      4⭐      1🍴 cupla) - C++ API to run CUDA/C++ on OpenMP, Threads, TBB, ... through Alpaka. [LGPLv3+]
•   1037⭐    130🍴 C++React) - A reactive programming library for C++11. [Boost]
•    960⭐     80🍴 FiberTaskingLib) - Task-based multi-threading library that supports task graphs with arbitrary dependencies. [Apache]
•      ?⭐      ?🍴 HPX) - A general purpose C++ runtime system for parallel and distributed applications of any scale. [Boost]
•    455⭐     45🍴 Intel Games Task Scheduler) - A task scheduling framework designed for the needs of game developers. [MIT]
•    751⭐    117🍴 Intel Parallel STL) - Intel® implementation of C++17 STL for C++11 and above. [Apache2]
• 🌎 Intel TBB - Intel® Threading Building Blocks. [Apache2]
•   1435⭐    157🍴 junction) - A library of concurrent data structures in C++. [BSD]
•   2299⭐    467🍴 Kokkos) - A performance portable programming model for parallel execution and memory abstraction. [BSD]
•   2675⭐    363🍴 libcds) - A C++ library of Concurrent Data Structures. [BSD]
•     52⭐      9🍴 Libclsph) - An OpenCL based GPU accelerated SPH fluid simulation library. [MIT]
•      ?⭐      ?🍴 libdill) - Introduces structured concurrency in C. [MIT]
•   2525⭐    477🍴 libdispatch) - Grand Central Dispatch (GCD), developed by Apple Inc., is a task parallelism technology based on the thread pool pattern. libdispatch is a library that provides the implementation of GCD's services. [Apache-2.0] 🌎 website
•    718⭐     30🍴 libfork) - A bleeding-edge, lock-free, wait-free, continuation-stealing tasking library built on C++20's coroutines. [MPL-2.0] 🌎 website
•      ?⭐      ?🍴 libmill) - Introduces Go-style concurrency in C. [MIT]
•   1966⭐    194🍴 marl) - Marl is a hybrid thread / fiber task scheduler written in C++ 11. [Apache-2.0]
•   1738⭐    283🍴 moderngpu) - moderngpu is a productivity library for general-purpose computing on GPUs. It is a header-only C++ library written for CUDA. The unique value of the library is in its accelerated primitives for solving irregularly parallel problems. [FreeBSD & Copyright, Sean Baxter]
•   3988⭐    996🍴 NCCL) - Optimized primitives for collective multi-GPU communication. [BSD]
•   1280⭐    107🍴 Neco) - Concurrency library for C (coroutines). [MIT]
• 🌎 OpenCL - The open standard for parallel programming of heterogeneous systems.
• OpenMP - The OpenMP API.
•    368⭐     34🍴 rotor) - Event loop friendly C++ actor micro framework. [MIT]
•    549⭐     51🍴 SObjectizer) - An implementation of Actor, Publish-Subscribe, and CSP models in one rather small C++ framework. [BSD-3-Clause]
•    605⭐    100🍴 Quantum) - A powerful C++ coroutine dispatcher framework built on top of 🌎 Boost.Coroutine2.
• RaftLib - The RaftLib C++ library, streaming/dataflow concurrency via C++ iostream-like operators. [Apache2]
•   4281⭐    708🍴 readerwriterqueue) - A fast single-producer, single-consumer lock-free queue for C++. [BSD]
•   1233⭐     91🍴 stdgpu) - Efficient STL-like Data Structures on the GPU. [Apache2]
•  11184⭐   1308🍴 Taskflow) - A General-purpose Parallel and Heterogeneous Task Programming System. (renamed from Cpp-Taskflow) [MIT]
•   8473⭐   2329🍴 ThreadPool) - A simple C++11 Thread Pool implementation [zlib]
• Thrust - A parallel algorithms library which resembles the C++ Standard Template Library (STL). [Apache2]
•    630⭐     47🍴 transwarp) - A header-only C++ library for task concurrency. [MIT]
•    715⭐     83🍴 VexCL) - A C++ vector expression template library for OpenCL/CUDA. [MIT]
• STAPL - A C++ parallel programming framework designed to work on both shared and distributed memory parallel computers. [BSD]
•   2652⭐    235🍴 concurrencpp) - A general concurrency library containing tasks, executors, timers and C++20 coroutines to rule them all.

Configuration

Configuration files, INI files

•    399⭐     73🍴 inifile-cpp) - A header-only and easy to use Ini file parser for C++. [MIT]
•   2792⭐    538🍴 inih) - Simple .INI file parser in C, good for embedded systems. [BSD-3-Clause]
•    446⭐     95🍴 inih) - Single header only C++ version of   2792⭐    538🍴 inih). [BSD-3-Clause]
•     44⭐      7🍴 ini-cpp) - Single header only C++ version, with some handy read/write interface, extend from   2792⭐    538🍴 inih). [BSD-3-Clause] 🌎 website
•   1040⭐    434🍴 iniparser) - INI file parser. [MIT]
•    301⭐     57🍴 inipp) - Simple header-only C++ ini parser and generator. [MIT]
•   1179⭐    382🍴 libconfig) - C, C++ library for processing structured configuration files. [LGPL-2.1] 🌎 website
•    494⭐    113🍴 libconfuse) - Small configuration file parser library for C. [ISC]
•    603⭐    117🍴 mINI) - INI file reader and writer. [MIT]
•   1223⭐    340🍴 simpleini) - Cross-platform C++ library providing a simple API to read and write INI-style configuration files. [MIT]
•   1853⭐    180🍴 toml++) - Header-only TOML parser and serializer for C++17 and later. [MIT] 🌎 website
•   1174⭐    180🍴 toml11) - a C++11 (or later) header-only toml parser/encoder depending only on C++ standard library. [MIT]

Containers

•     75⭐     27🍴 C++ B-tree) - A template library that implements ordered in-memory containers based on a B-tree data structure. [Apache2]
•    165⭐     15🍴 dynamic_bitset) - Simple Useful Libraries: C++17/20 header-only dynamic bitset. [MIT] 🌎 website
•    423⭐     45🍴 fixed-containers) - Header-only C++20 library that provides fixed capacity constexpr containers. [MIT]
•   1794⭐    197🍴 flat_hash_map) - A very fast flat hashtable with Fibonacci hashing.
•   1460⭐    112🍴 frozen) - a header-only, constexpr alternative to gperf for C++14 users. [Apache-2.0]
•    257⭐     85🍴 Hashmaps) - Implementation of open addressing hash table algorithms in C++. [MIT]
•    833⭐    117🍴 hat-trie) - C++ implementation of a fast and memory efficient HAT-trie. [MIT]
•    754⭐     69🍴 Hopscotch map) - A fast header-only hash map which uses hopscotch hashing for collisions resolution. [MIT]
•    288⭐     77🍴 LSHBOX) - A c++ toolbox of locality-sensitive hashing (LSH), provides several popular LSH algorithms, also support Python and MATLAB. [GPL]
•   3038⭐    292🍴 parallel-hashmap) - A family of header-only, very fast and memory-friendly hashmap and btree containers [Apache2] 🌎 website
•    826⭐     99🍴 PGM-index) - A data structure that enables fast lookup, predecessor, range searches and updates in arrays of billions of items using orders of magnitude less space than traditional indexes. [Apache2] 🌎 website
•    464⭐     33🍴 plf::colony) - An unordered "bag"-type container which outperforms std containers in high-modification scenarios while maintaining permanent pointers to non-erased elements regardless of insertion/erasure. [zLib] website
•    157⭐     20🍴 plf::list) - A std::list implementation which removes range splicing in order to enable cache-friendlier structure, yielding significant performance gains. [zLib] website
•     67⭐      6🍴 plf::stack) - A replacement container for the std::stack container adaptor, with better performance than any std container in a stack context. [zLib] website
•    161⭐     14🍴 ring_span lite) - A simplified implementation of Arthur O'Dwyer's ring_span implementation ie. a circular buffer view. [MIT]
•   1581⭐    153🍴 robin-hood-hashing) - Fast & memory efficient hashtable based on robin hood hashing for C++14. [MIT]
•   1386⭐    130🍴 robin-map) - Fast hash map and hash set using robin hood hashing. [MIT]
•   1288⭐    127🍴 sparsepp) - A fast, memory efficient hash map for C++. [BSD 3-clause]
•      6⭐      2🍴 sqlitemap) - Persistent map backed by SQLite. [MIT]
•    108⭐     23🍴 st_tree) - A fast and flexible c++ template class for tree data structures. [Apache-2.0]
•    107⭐     11🍴 svector) - Compact SVO optimized vector for C++17 or higher. [MIT]
•    146⭐     32🍴 tree.hh) - An STL-like C++ header-only tree library. [GPL2+]
•   1139⭐     93🍴 unordered_dense) - A fast & densely stored hashmap and hashset based on robin-hood backward shift deletion. [MIT]

Cryptography

Cryptography and Encryption Libraries

• Bcrypt - A cross platform file encryption utility. Encrypted files are portable across all supported operating systems and processors. [BSD]
• BeeCrypt - A portable and fast cryptography library. [LGPLv2.1+]
• Botan - A crypto library for C++. [BSD-2]
•   5289⭐   1634🍴 Crypto++) - A free C++ class library of cryptographic schemes. [Boost] website
•    202⭐     51🍴 digestpp) - C++11 header-only message digest (hash) library. [PublicDomain]
• 🌎 GnuPG - A complete and free implementation of the OpenPGP standard. [GPL]
• GnuTLS - A secure communications library implementing the SSL, TLS and DTLS protocols. [LGPL2.1]
• Libgcrypt - A general purpose cryptographic library originally based on code from GnuPG. [LGPLv2.1+]
• LibreSSL - A free version of the SSL/TLS protocol forked from OpenSSL in 2014. [?]
•  12896⭐   1803🍴 libsodium) - P(ortable|ackageable) NaCl-based crypto library, opinionated and easy to use. [ISC]
•    707⭐    107🍴 libhydrogen) - A lightweight, secure, easy-to-use crypto library suitable for constrained environments. [ISC]
•   1699⭐    485🍴 LibTomCrypt) - A fairly comprehensive, modular and portable cryptographic toolkit. [WTFPL]
•   6080⭐   2748🍴 mbedTLS) - An open source, portable, easy to use, readable and flexible SSL library, previously known as PolarSSL. [Apache2] 🌎 website
• Nettle - A low-level cryptographic library. [LGPL]
•  28420⭐  10791🍴 OpenSSL) - A robust, commercial-grade, full-featured, and Open Source cryptography library. [Apache] website
•    111⭐     22🍴 retter) - A collection of hash functions, ciphers, tools, libraries, and materials related to cryptography.
•   4620⭐    738🍴 s2n) - An implementation of the TLS/SSL protocols. [Apache]
•   1362⭐    197🍴 sha1collisiondetection) - Library and command line tool to detect SHA-1 collision in a file. [MIT]
•  13550⭐   1179🍴 Tink) - A multi-language, cross-platform library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse. [Apache-2.0]
•   4660⭐   1353🍴 Tiny AES in C) - Small portable AES128/192/256 in C. [PublicDomain]
•   1934⭐    153🍴 Themis) - crypto library for painless data security, providing symmetric and asymmetric encryption, secure sockets with forward secrecy, for mobile and server platforms. [Apache2]
•     95⭐     21🍴 HEhub) - A library for homomorphic encryption and its applications. [Apache2]

CSV

Libraries for parsing Comma Separated Value (CSV) files

•     15⭐      1🍴 commata) - Just another header-only C++17 CSV parser. [Unlicense]
•    599⭐    104🍴 csv2) - Fast CSV parser for modern C++. [MIT]
•     31⭐      5🍴 Csv::Parser) - Compile-time and runtime CSV parser written in C++17. [Zlib]
•   2286⭐    440🍴 Fast C++ CSV Parser) - Small, easy-to-use and fast header-only library for reading CSV files. [BSD-3-Clause]
•   2074⭐    182🍴 Glaze) - High performance, header only, CSV library with reflection support. [MIT]
•     88⭐     12🍴 lazycsv) - A fast, lightweight and single-header csv parser for modern C++. [MIT]
•    981⭐    191🍴 rapidcsv) - An easy-to-use, header-only C++ CSV parser library. [BSD-3-Clause]
•     55⭐      5🍴 ssp) - A header only "csv" parser which is fast and versatile with modern C++ api. [MIT]
•   1016⭐    175🍴 Vince's CSV Parser) - A fast, self-contained, streaming C++17 CSV parser with optional type-casting and statistics. [MIT]
•    235⭐     17🍴 zsv) - The world's fastest (simd) CSV parser, with an extensible CLI. [MIT]

Database

Database Libraries, SQL Servers, ODBC Drivers, and Tools

•    342⭐    181🍴 ClickHouse) - C++ client for ClickHouse DBMS. [Apache2]
•    241⭐     18🍴 CrossDB) - Ultra High-performance Lightweight Embedded and Server OLTP RDBMS. [MPL-2.0] 🌎 website
• 🌎 DuckDB - in-process SQL OLAP Database Management System. [MIT] 🌎 website
•    717⭐    120🍴 hiberlite) - C++ Object-relational mapping for sqlite3. [BSD]
•   6482⭐   1842🍴 Hiredis) - A minimalistic C client library for the Redis database. [BSD]
•   4031⭐    381🍴 Infinity) - The AI-native database built for LLM applications, providing incredibly fast vector and full-text search. [Apache2]
•   3041⭐    198🍴 Kuzu) - Embeddable property graph database management system built for query speed and scalability. Implements Cypher. [MIT] 🌎 website
•   4002⭐    559🍴 Kvrocks) - A distributed key value NoSQL database that uses RocksDB as storage engine and is compatible with Redis protocol. [Apache2]
•  38056⭐   8055🍴 LevelDB) - A fast key-value storage library written at Google that provides an ordered mapping from string keys to string values. [BSD]
•   1355⭐    200🍴 libpg_query) - C library for accessing the PostgreSQL parser outside of the server environment. [BSD-3-Clause]
•   1170⭐    260🍴 libpqxx) - The official C++ client API for PostgreSQL. [BSD-3-Clause]
• 🌎 LMDB - Very fast embedded key/value store with full ACID semantics. [OpenLDAP]
•    278⭐     87🍴 LMDB++) - C++11 wrapper for the LMDB embedded database library. [PublicDomain]
•     41⭐      6🍴 mgclient) - C/C++ Memgraph Client. [Apache2]
•    848⭐    456🍴 MongoDB C Driver) - MongoDB client library for C. [Apache2]
•   1077⭐    544🍴 MongoDB C++ Driver) - C++ driver for MongoDB. [Apache2]
•    347⭐    179🍴 MongoDB Libbson) - A BSON utility library. [Apache2]
• MySQL++ - A C++ wrapper for MySQL's C API. [LGPL]
•    361⭐     89🍴 nanodbc) - A small C++ wrapper for the native C ODBC API. [MIT]
• 🌎 ODB - An open-source, cross-platform, and cross-database object-relational mapping (ORM) system for C++. [GPLv2]
•    189⭐     79🍴 redis3m) - Wrapper of hiredis with clean C++ interface, supporting sentinel and ready to use patterns. [Apache2]
•    791⭐     61🍴 Reindexer) - Embeddable, in-memory, document-oriented database with a high-level Query builder interface. [Apache2] 🌎 website
•  30402⭐   6595🍴 RocksDB) - Embedded key-value store for fast storage from facebook. [BSD]
•    550⭐     86🍴 SimDB) - High performance, shared memory, lock free, cross platform, single file, minimal dependencies, C++11 key-value store. [Apache2]
•   1513⭐    497🍴 SOCI) - A database abstraction layer for C++. [Boost]
•    987⭐     80🍴 Speedb) - Community-led project: A RocksDB compliant high performance scalable embedded key-value store. [Apache2]
• SQLite - A completely embedded, full-featured relational database in a few 100k that you can include right into your project. [PublicDomain]
•   2529⭐    545🍴 SQLiteC++) - SQLiteC++ (SQLiteCpp) is a smart and easy to use C++ SQLite3 wrapper. [MIT]
•    938⭐    164🍴 sqlite_modern_cpp) - Header only C++14 wrapper around sqlite library. [MIT]
•   2530⭐    333🍴 sqlite_orm) - SQLite ORM light header only library for modern C++. [AGPL + paid MIT]
•   2575⭐    350🍴 sqlpp11) - A type safe embedded domain specific language for SQL queries and results in C++. [BSD-2-Clause]
•    210⭐     21🍴 TidesDB) - High-performance, durable, transactional embedded storage engine designed for flash and RAM optimization. [MPL-2.0] 🌎 website
•   1978⭐    196🍴 TileDB) - Fast Dense and Sparse Multidimensional Array DBMS. [MIT] 🌎 website
•    323⭐     31🍴 TinyORM) - Modern C++ ORM library. [MIT] 🌎 website
•   2238⭐    173🍴 UnQLite) - A self-contained, serverless, zero-configuration, transactional NoSQL engine. [BSD-2-Clause] 🌎 website
• 🌎 upscaledb - An embedded "typed" key/value store with a built-in query interface. [GPLv3]
•     11⭐      1🍴 TigerBeetleDB C++ client (Community)) - TigerBeetle is a financial accounting database designed for mission critical safety and performance to power the future of financial services. [BSL-1.0]
•    737⭐     78🍴 Trilogy) - a client library for MySQL-compatible database servers, designed for performance, flexibility, and ease of embedding. [MIT]
•    604⭐     34🍴 UStore) - Multi-Modal database for BLOBs, JSON, and graphs. [Apache2]
•   3866⭐   1402🍴 Velox) - A C++ vectorized database acceleration library aimed to optimizing query engines and data processing systems. [Apache-2.0] 🌎 website

Data visualization

Data visualization Libraries

•     24⭐      1🍴 gplot++) - Cross-platform header-only C++ plotting library that interfaces with Gnuplot. [MIT]
•   4656⭐    352🍴 matplotplusplus) - C++ Graphics Library for Data Visualization. [MIT] 🌎 website
•    308⭐     36🍴 morphologica) - C++ header-only graphing and data visualization with modern OpenGL. [Apache-2.0] 🌎 website

Debug

Debugging Libraries, Memory Leak and Resource Leak Detection, Unit Testing

•   4123⭐    522🍴 backward-cpp) - A beautiful stack trace pretty printer for C++. [MIT]
• 🌎 Bencher - A suite of continuous benchmarking tools designed to catch performance regressions in CI. [MIT]/[Apache2]
•   9691⭐   1697🍴 benchmark) - Google provided small microbenchmark support library. [Apache2]
•    203⭐    145🍴 Boost.Test) - Boost Test Library. [Boost] 🌎 website
•   1124⭐    220🍴 check) - Check is a unit testing framework for C. [LGPL-2.1] 🌎 website
•   6377⭐    672🍴 doctest) - The lightest feature rich C++ single header testing framework. [MIT]
•  19733⭐   3136🍴 Catch2) - A modern, C++-native, test framework for unit-tests, TDD and BDD. [Boost]
•    854⭐     97🍴 Celero) - C++ Benchmarking Framework. [Apache2]
•    354⭐     12🍴 cpp-dump) - A C++ library for debugging purposes that can print any variable, even user-defined types. [MIT]
•   1443⭐    534🍴 CppUTest) - Unit testing and mocking framework for C/C++. [BSD-3-clause]
• CUTE - C++ Unit Testing Easier. [LGPL3]
• 🌎 CMocka - unit testing framework for C with support for mock objects. [Apache2]
•    312⭐     51🍴 CppBenchmark) - Performance benchmark framework for C++ with nanoseconds measure precision. [MIT]
•   1181⭐    131🍴 Cpptrace) - A simple, portable, and self-contained C++ stacktrace library supporting C++11 and greater. [MIT]
• CppUnit - C++ port of JUnit. [LGPL2]
•     57⭐      3🍴 CrashCatch) - Single-header crash reporting for C++ that logs stack traces and creates .dmp and .txt crash dumps. [MIT] 🌎 website
• 🌎 CTest - The CMake test driver program. [BSD]
•   3181⭐    270🍴 dbg-macro) - A dbg(…) macro for C++. [MIT]
•   1143⭐    162🍴 DebugViewPP) - Debug logging viewer. [Boost]
• Deleaker - A tool for resource leak detection, including memory, GDI and handle leaks.
•   1302⭐    178🍴 FakeIt) - Simple mocking framework for C++. [MIT]
•    870⭐    172🍴 fff) - A micro-framework for creating fake C functions. [MIT]
•  36958⭐  10492🍴 Google Mock) - A library for writing and using C++ mock classes. [BSD]
•  36958⭐  10492🍴 Google Test) - Google C++ Testing Framework. [BSD]
•    200⭐     68🍴 Hippomocks) - Single-header mocking framework. [LGPL-2.1]
•    715⭐     36🍴 IceCream-Cpp) - Never use cout/printf to debug again [MIT]
•    184⭐     24🍴 ig-debugheap) - Multiplatform debug heap useful for tracking down memory errors. [BSD]
•    665⭐     50🍴 libassert) - The most over-engineered C++ assertion library. [MIT]
•    258⭐     63🍴 libtap) - Write tests in C. [GPL2]
•   1539⭐    124🍴 microprofile) - Profiler with web-view for multiple platforms. [Unlicense]
•    604⭐    101🍴 MinUnit) - A minimal unit testing framework for C self-contained in a single header file. [MIT]
•   1594⭐     91🍴 nanobench) - Simple, fast, accurate single-header microbenchmarking functionality for C++11/14/17/20. [MIT] 🌎 website
•    143⭐     14🍴 Nanotimer) - A simple low-overhead cross-platform timer class for benchmarking. [zLib] website
•    365⭐     48🍴 Nonius) - A C++ micro-benchmarking framework. [CC]
•   3258⭐    283🍴 Remotery) - Single C File Profiler with Web Viewer. [Apache2]
•    292⭐     12🍴 snitch) - Lightweight C++20 testing framework. [Boost]
•    504⭐     26🍴 Touca) - Open-source regression testing system that you can self-host. [Apache2] 🌎 website
•    573⭐    178🍴 UnitTest++) - A lightweight unit testing framework for C++. [MIT/X Consortium license]
•   4712⭐   1054🍴 Unity) - Simple Unit Testing for C. [MIT]
•    920⭐     67🍴 utest.h) - Single header unit testing framework for C and C++. [Unlicense]
•    319⭐     14🍴 utl::profiler) - Singe-header profiler for C++17. [MIT]
•   1373⭐    134🍴 μt) - C++20 single header/single module, macro-free μ(micro)/Unit Testing Framework. [Boost]
• 🌎 VLD - Visual Leak Detector. A free, robust, open-source memory leak detection system for Visual C++.

Documentation

•    107⭐     10🍴 Doxide) - Modern documentation for modern C++, configure with YAML, output Markdown. [Apache 2.0] 🌎 website
•   6127⭐   1317🍴 doxygen) ⚡ - The de facto standard tool for generating documentation from annotated C++ sources. [GPL2] 🌎 website
•    308⭐     25🍴 doxyrest) - A compiler from Doxygen XML to reStructuredText for Sphinx. [MIT]
•    331⭐     24🍴 hdoc) - The modern documentation tool for C++. [AGPL/Proprietary] 🌎 website
•    214⭐     35🍴 Natural Docs) - Natural Docs is an open source documentation generator for multiple programming languages. [AGPL/Proprietary] 🌎 website
•   7332⭐   2263🍴 Sphinx) - Sphinx makes it easy to create intelligent and beautiful documentation. [BSD-2-Clause] 🌎 website

DSP

Digital signal processing.

•   1979⭐    390🍴 DSPFilters) - A collection of useful C++ classes for digital signal processing. [MIT]
• FFTW - A C library for computing the DFT in one or more dimensions. [GPL]
•    718⭐    153🍴 iir1) - IIR Realtime C++ filter library. [MIT]
•   1710⭐    323🍴 kissfft) - A Fast Fourier Transform (FFT) library that tries to Keep it Simple, Stupid. [BSD-3-Clause]
•    102⭐     37🍴 pocketfft) - FFT implementation based on FFTPack, but with several improvements. [BSD-3-Clause]
•    410⭐    135🍴 wavelib) - C implementation of 1D and 2D wavelet transforms. [BSD-3-Clause]

Font

Libraries for parsing and manipulating font files.

• 🌎 Fontconfig - Font configuration and customization library. [MIT] 🌎 website
• 🌎 FreeType - FreeType is a freely available software library to render fonts. [FTL & GPLv2]
•    438⭐     64🍴 otfcc) - A C library and utility used for parsing and writing OpenType font files. [Apache-2.0]
•   4925⭐    681🍴 harfbuzz) - A text shaping engine. [Old MIT]
•    522⭐     40🍴 libschrift) - A lightweight TrueType font rendering library. [ISC]

Game Engine

•   1889⭐    164🍴 Acid) - A high speed C++17 Vulkan game engine. [MIT]
• Allegro - A cross-platform library mainly aimed for video games and multimedia programming. [zlib]
•   1164⭐    236🍴 Axmol Engine) - A cross-platform game engine for desktop, mobile, and XBOX (UWP), derived from Cocos2d-x-4.0. [MIT] 🌎 website
• Cocos2d-x - A multi-platform framework for building 2d games, interactive books, demos and other graphical applications. [MIT]
•   1917⭐    208🍴 Corange) - A game engine written in pure C, SDL and OpenGL. [BSD]
•     13⭐      0🍴 crown) - Crown is a general purpose data-driven game engine, written from scratch in orthodox C++ with a minimalistic and data-oriented design philosophy in mind. [MIT]
• delta3d - A robust simulation platform. [LGPL2]
•  11503⭐    986🍴 EnTT) - Gaming meets modern C++. [MIT]
•   4677⭐   1321🍴 GamePlay) - A cross-platform native C++ game framework for creating 2D/3D mobile and desktop games. [Apache2]
• 100703⭐  23068🍴 Godot) - A fully featured, open source, MIT licensed, game engine. [MIT]
•    118⭐     22🍴 Grit) - Community project to build a free game engine for implementing open world 3D games. [MIT]
•   3746⭐    169🍴 Halley) - A lightweight game engine written in C++14 with a "true" entity-component system. [Apache 2.0]
•  12512⭐   1538🍴 Hazel Game Engine) - Hazel is primarily an early-stage interactive application and rendering engine for Windows. [Apache-2.0 license]
•      ?⭐      ?🍴 JNGL) - 2D library for Linux, Windows, macOS, Android, iOS, Xbox, the Nintendo Switch and the Web. [zlib] 🌎 website
•   2152⭐    350🍴 KlayGE) - a cross-platform open source game engine with plugin-based architecture. [GPLv2] website
•   1206⭐     72🍴 nCine) - A cross-platform 2D game engine with an emphasis on performance, written in C++11 and optionally scriptable in Lua. [MIT] 🌎 website
•   8487⭐   2332🍴 o3de) - An open-source, real-time, multi-platform 3D engine based on Amazon Lumberyard. [Apache2] 🌎 website
•   3264⭐    476🍴 OpenXRay) - a community-modified X-Ray engine used in S.T.A.L.K.E.R. game series. [Modified BSD/non-commercial only]
• Oxygine - A cross-platform 2D C++ game engine. [MIT]
•   4875⭐    835🍴 Panda3D) - A game engine, a framework for 3D rendering and game development for Python and C++ programs. [Modified BSD] 🌎 website
•   4003⭐    918🍴 PixelGameEngine) - The official distribution of olcPixelGameEngine, a tool used in javidx9's YouTube videos and projects. [OLC3]
•   2391⭐    353🍴 Polycode) - A cross-platform framework for creative code in C++ (with Lua bindings). [MIT] website
•     54⭐      7🍴 quakeforge) - Actively maintained branch of the original Quake engine code with 20+ years of development. [GPL-2.0]
•  27951⭐   2641🍴 raylib) - A simple and easy-to-use library to enjoy videogames programming. [zlib/libpng] website
•   3756⭐    860🍴 Spring) - A powerful free cross-platform RTS game engine. [GPLv2/GPLv3] 🌎 website
•   1407⭐    120🍴 Torque2D) - An open-source and cross-platform C++ engine built for 2D game development. [MIT] 🌎 website
•   1763⭐    193🍴 Torque3D) - An open-source C++ engine built for 3D game development. [MIT] 🌎 website
•   1589⭐    103🍴 toy engine) - toy is a thin and modular c++ game engine and offers simple expressive c++ idioms to design full featured 2D or 3D games in fast iterations.
• 🌎 Urho3D - A free lightweight, cross-platform 2D and 3D game engine implemented in C++. Greatly inspired by OGRE and Horde3D. [MIT]
•   1769⭐    222🍴 ezEngine) - Is a free, open-source game engine written in C++. Its philosophy is to be modular and flexible, such that it can be adapted to many different use cases. [MIT] 🌎 website

Graph

•    623⭐    130🍴 CXXGraph) - free C++(17) graph header-only library for representation and algorithms execution. [AGPL-3.0]
•    330⭐     58🍴 Graaf) - A general-purpose lightweight C++20 graph library. [MIT] 🌎 website

GUI

Graphic User Interface

•   1704⭐     98🍴 Boden) - Native, mobile, cross-platform GUI Framework. [GPL/LGPL/Proprietary] 🌎 website
• CEGUI - Flexible, cross-platform GUI library.
•   3537⭐    265🍴 Elements) - Lightweight, fine-grained, resolution independent, modular GUI library. [MIT]
• FLTK - Fast, light, cross-platform C++ GUI toolkit. [LGPL2]
• FOX Toolkit - an open-source, cross-platform widget toolkit. [LGPL]
•   2394⭐    302🍴 GacUI) - GPU Accelerated C++ User Interface, with WYSIWYG developing tools, XML supports, built-in data binding and MVVM features. [Ms-PL]
• GTK+ - A multi-platform toolkit for creating graphical user interfaces. [LGPL]
• gtkmm - The official C++ interface for the popular GUI library GTK+. [LGPL]
•  67883⭐  11155🍴 imgui) - Immediate Mode Graphical User Interface with minimal dependencies. [MIT]
•   5517⭐    600🍴 implot) - Immediate Mode Plotting widgets for imgui. [MIT]
• 🌎 iup - Multi-platform toolkit for building graphical user interfaces. [MIT]
•  10837⭐    622🍴 libui) - Simple and portable (but not inflexible) GUI library in C that uses the native GUI technologies of each platform it supports. [MIT]
•    784⭐    222🍴 MyGUI) - Fast, flexible and simple GUI. [MIT]
•   2432⭐    340🍴 nana) - Nana is a cross-platform library for GUI programming in modern C++ style. [Boost]
•   1702⭐    212🍴 NanoGui) - A minimalistic cross-platform widget library for OpenGL 3.x or higher. [BSD]
•    608⭐     61🍴 NAppGUI) - SDK for building cross-platform desktop apps in ANSI-C. [MIT] 🌎 website
•  10334⭐    629🍴 nuklear) - A single-header ANSI C gui library. [PublicDomain]
• QCustomPlot - Qt plotting widget without further dependencies. [GPLv3]
• Qwt - Qt Widgets for Technical Applications. [Own based on LGPL]
• QwtPlot3D - A feature-rich Qt/OpenGL-based C++ programming library, providing essentially a bunch of 3D-widgets. [zlib]
•   3397⭐    356🍴 RmlUi) - The HTML/CSS User Interface library evolved. Fork of libRocket. [MIT]
•    558⭐     37🍴 Saucer) - A modern, cross-platform C++ webview library. [MIT]
• Sciter - Sciter is an embeddable HTML/CSS/scripting engine aimed to be used as an UI layer of modern desktop applications. [Free/Commercial]
•  20139⭐    725🍴 Slint) - Lightweight GUI toolkit for desktop and embedded. [GPL/Free/Proprietary] 🌎 website
•    949⭐    105🍴 TGUI) - Cross-platform modern c++ GUI. [Zlib] 🌎 website
•   3752⭐    243🍴 WebUI) - Use any web browser as GUI, with your preferred language in the backend and HTML5 in the frontend. [MIT] 🌎 website
•    139⭐     59🍴 wxCharts) - A library to create charts in wxWidgets applications. [MIT] 🌎 website
• wxWidgets - A C++ library that lets developers create applications for Windows, Mac OS X, Linux and other platforms with a single code base. [Own LGPL]
•   3572⭐    159🍴 Yue) - A library for creating native cross-platform GUI apps. [LGPLv2]

Graphics

•  12253⭐   3071🍴 assimp) - Open Asset Import Library (assimp) is a cross-platform 3D model import library which aims to provide a common API for different 3D asset file formats. [BSD-3-Clause] website
•  16056⭐   2011🍴 bgfx) - A cross-platform rendering library. [BSD]
•   1789⭐    129🍴 Blend2D) - 2D vector graphics engine powered by a JIT compiler. [Zlib] 🌎 website
• Cairo - A 2D graphics library with support for multiple output devices. [LGPL2 or Mozilla MPL]
•     75⭐     21🍴 C-Turtle) - A C++11 header-only turtle graphics library acting as a CImg wrapper. [MIT]
•   3978⭐    354🍴 Diligent Engine) - A modern cross-platform low-level 3D graphics library. [Apache2]
•   2727⭐    528🍴 DirectXTK) - A collection of helper classes for writing DirectX 11.x code in C++. [MIT]
•  14154⭐   5626🍴 GLFW) - A simple, cross-platform OpenGL wrangling library. [zlib/libpng]
•    112⭐     22🍴 GLFWPP) - A thin modern C++17 header-only wrapper for GLFW. [MIT]
•    622⭐     65🍴 Harfang 3D) 3D visualization library usable in C++, Python, Lua and Go. Based on BGFX. [GPLv3/LGPLv3/Proprietary] 🌎 website
•   1754⭐     81🍴 herebedragons) - A basic 3D scene implemented with various engines, frameworks or APIs. [MIT] website
•   1570⭐    306🍴 Horde3D) - A small 3D rendering and animation engine. [EPL]
•   1423⭐     91🍴 Ion) - A small and efficient set of libraries for building cross-platform client or server applications that use 3D graphics. [Apache2] 🌎 website
• Irrlicht - A high performance realtime 3D engine written in C++. [zlib]
•   4844⭐   1176🍴 libigl) - Simple C++ geometry processing library. [MPL2]
•   2389⭐    150🍴 LLGL) - Low Level Graphics Library (LLGL) is a thin abstraction layer for the modern graphics APIs. [BSD-3-Clause]
•   1056⭐    146🍴 LunaSVG) - a standalone SVG rendering library in C++. [MIT]
•   5027⭐    452🍴 magnum) - Lightweight and modular C++11/C++14 graphics middleware for games and data visualization. [MIT] website
•    345⭐     22🍴 micro-gl) - Realtime, Embeddable, Headers Only C++11 CPU vector graphics. no STD lib, no FPU and no GPU required. [CUSTOM] 🌎 website
•   5435⭐    793🍴 NanoVG) - Antialiased 2D vector drawing library on top of OpenGL for UI and visualizations. [Zlib]
• Ogre 3D ⚡ - A scene-oriented, real-time, flexible 3D rendering engine (as opposed to a game engine) written in C++. [MIT] 🌎 website
• OpenSceneGraph - An open source high performance 3D graphics toolkit. [OSGPL]
•   2995⭐    579🍴 OpenSubdiv) - Pixar's library for evaluating and rendering subdivision surfaces on CPU and GPU. [Modified Apache2]
• OpenVDB - Library and tools for storing, editing, and rendering volumetric datasets. [MPL2]
• Panda3D - A framework for 3D rendering and game development for Python and C++. [BSD]
•    474⭐    134🍴 Partio) - Library for wrangling particle data, with support for most common file formats. [Modified BSD]
•  10057⭐   1611🍴 Skia) - A complete 2D graphic library for drawing Text, Geometries, and Images. [BSD] 🌎 website
•   1167⭐    149🍴 ThorVG) - a platform-independent portable library that allows for drawing vector-based scenes and animations, including SVG and Lottie. [MIT] 🌎 website
•   1291⭐    212🍴 TinySpline) - A small, yet powerful ANSI C library for interpolating, transforming, and querying arbitrary NURBS, B-Splines, and Bézier curves. [MIT]
•   4648⭐   1002🍴 urho3d) - Cross-platform rendering and game engine. [Many different, mostly MIT]
•   2878⭐    208🍴 Yocto/GL) - Tiny C++ Libraries for Data-Driven Physically-based Graphics. [MIT]
•   2162⭐    122🍴 olive.c) - Simple 2D Graphics Library. [MIT]

Image Processing

•    186⭐    168🍴 Boost.GIL) - Generic Image Library. [Boost] 🌎 website
•     47⭐     13🍴 BitmapPlusPLus) - Simple and Fast header only Bitmap C++ library. [MIT]
• CImg - A small, open source, C++ toolkit for image processing. [Own LGPL or GPL]
• 🌎 CxImage - An image processing and conversion library to load, save, display, transform BMP, JPEG, GIF, PNG, TIFF, MNG, ICO, PCX, TGA, WMF, WBMP, JBG, J2K images. [zlib]
•  14121⭐   3442🍴 Dlib) ⚡ - A modern C++11 machine learning, computer vision, numerical optimization, and deep learning toolkit. [Boost] website
•    942⭐     59🍴 fpng) - Super fast C++ .PNG writer/reader. [Unlicense]
• FreeImage - An open source library that supports popular graphics image formats and others as needed by today's multimedia applications. [GPL2 or GPL3]
•    942⭐    273🍴 GD) - GD Graphics Library, famously used in PHP for image loading/manipulation & thumbnail generation. [custom permissive license, requires mention in user docs] website
• DCMTK - DICOM Toolkit.
• GDCM - Grassroots DICOM library.
• ITK - An open-source, cross-platform system for image analysis. [Apache2 from ITK 4.0]
• [Jpegli][https://github.com/google/jpegli] - an improved JPEG encoder and decoder implementation. [BSD-3-Clause]
•   1953⭐    415🍴 Leptonica) - Leptonica is an open source library containing software that is broadly useful for image processing and image analysis applications. [BSD-2-Clause] website
•   1853⭐    242🍴 libavif) - Library for encoding and decoding .avif files. [BSD-2-Clause]
•  12611⭐   3044🍴 libfacedetection) - Open source library for face detection in images. The face detection speed can reach 1500FPS. [BSD]
•   4033⭐   1083🍴 libjpeg-turbo) - A JPEG image codec that uses SIMD instructions to accelerate baseline JPEG encoding and decoding. [IJG & BSD-3-Clause & zlib] 🌎 website
•   3094⭐    311🍴 libjxl) - JPEG XL image format reference implementation. [BSD-3-Clause]
•   1464⭐    713🍴 libpng) - the reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. [libpng-2.0] 🌎 website
•    793⭐     82🍴 libspng) - Simple, modern libpng alternative. [BSD-2] 🌎 website
•     64⭐      5🍴 libvips) - A fast image processing library with low memory needs. [LGPL] website
•   2232⭐    447🍴 LodePNG) - PNG encoder and decoder in C and C++. [Zlib]
• 🌎 Magick++ - ImageMagick program interfaces for C++. [Apache2]
• 🌎 MagickWnd - ImageMagick program interfaces for C. [Apache2]
•   5599⭐    429🍴 MozJPEG) - Improved JPEG encoder. [BSD/BSD-3-Clause/ZLIB]
• OpenCV ⚡ - Open source computer vision. [Apache2] 🌎 website
• OpenEXR - Cross-platform library for high dynamic range imaging. [Modified BSDF]
•   2154⭐    636🍴 OpenImageIO) - Powerful image and texture wrangling library with support for a wide number of common lossy and RAW formats. [Modified BSD]
•   1048⭐    490🍴 OpenJPEG) - an open-source JPEG 2000 codec written in C language. [BSD-2-Clause]
•    191⭐      8🍴 PlutoFilter) - A single-header, zero-allocation image filter library in C. [MIT]
•   7259⭐    347🍴 QOI) - The “Quite OK Image Format” for fast, lossless image compression. [MIT]
•    328⭐     26🍴 SAIL) - Easy-to-use cross-platform image decoding library with pluggable image codecs. [MIT]
•   2196⭐    438🍴 Simd) - C++ image processing library with using of SIMD: SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, VMX(Altivec) and VSX(Power7), NEON for ARM. [MIT]
•  29782⭐   7881🍴 stb-image) - STB single-header image loading library. [Public Domain]
• tesseract-ocr - An OCR engine. [Apache2]
•    171⭐     35🍴 TinyDNG) - Header-only Tiny DNG/TIFF loader and writer in C++. [MIT]
•    126⭐     46🍴 TinyEXIF) - Tiny ISO-compliant C++ EXIF and XMP parsing library for JPEG. [MIT]
•    155⭐     45🍴 TinyTIFF) - lightweight TIFF reader/writer library. [GPL-3.0]
•    727⭐    113🍴 Video++) - A C++14 high performance video and image processing library. [MIT]
•    427⭐    197🍴 VIGRA) - A generic C++ computer vision library for image analysis. [MIT X11]
• VTK - Open-source, freely available software system for 3D computer graphics, image processing and visualization. [BSD]

Internationalization

• gettext - GNU 'gettext'. [GPL2]
• IBM ICU - A set of C/C++ and Java libraries providing Unicode and Globalization support. [ICU]
• libiconv - An encoding conversion library between different character encodings. [GPL]
•   1500⭐     95🍴 simdutf) - Unicode routines (UTF8, UTF16, UTF32): billions of characters per second using SSE2, AVX2, NEON, AVX-512. [Apache-2/MIT]
•    298⭐     27🍴 uni-algo) - Unicode Algorithms Implementation for C/C++. [Unlicense or MIT]
•   1876⭐    135🍴 utf8.h) - Single header utf8 string functions for C and C++. [Unlicense]
•   1151⭐    156🍴 utf8proc) - A clean C library for processing UTF-8 Unicode data. [MIT]

Inter-process communication

• 🌎 Apache Thrift - Efficient cross-language IPC/RPC, works between C++, Java, Python, PHP, C#, and many more other languages. Originally developed by Facebook. [Apache2]
•    157⭐    126🍴 Boost.Interprocess) - Header-only Boost library that supports kernel-level shared memory and memory-mapped files, with in-built synchronization mechanisms (semaphores, mutexes, and more). [Boost] 🌎 website
•  17278⭐   4050🍴 bRPC) - bRPC is an Industrial-grade RPC framework using C++ Language, which is often used in high performance system such as Search, Storage, Machine learning, Advertisement, Recommendation etc. [Apache2] 🌎 website
•  12395⭐    977🍴 Cap'n Proto) - Fast data interchange format and capability-based RPC system. [MIT] 🌎 website
•     11⭐      3🍴 eCAL) - Pub/sub, client/server, C++/Python/C#, various message protocols (protobuf, capnproto ..). [Apache2] website
•  43566⭐  10873🍴 gRPC) - A high performance, open source, general-purpose RPC framework. [BSD] website
•   2130⭐    603🍴 Ice) - Comprehensive RPC framework with support for C++, C#, Java, JavaScript, Python and more. [GPLv2]
•   1890⭐    437🍴 iceoryx) - True zero-copy inter-process communication framework for safety critical systems with bindings for C, Rust. Runs on Linux, QNX, Windows, Mac OS, FreeBSD. [Apache2] 🌎 website
•    981⭐    323🍴 libjson-rpc-cpp) - JSON-RPC framework for C++ servers and clients. [MIT]
•   6152⭐   1020🍴 nanomsg) - A simple high-performance implementation of several "scalability protocols". [MIT] website
•   4225⭐    508🍴 nng) - nanomsg-next-generation, a light-weight brokerless messaging library. [MIT] 🌎 website
•   1789⭐    392🍴 rpclib) - A modern C++ msgpack-RPC server and client library. [MIT]
•     42⭐      9🍴 simple-rpc-cpp) - A simple RPC wrapper generator to C/C++ functions. [BSD]
•   2086⭐    407🍴 SRPC) - A lightweight RPC system that supports multiple protocols and OpenTelemetry. [Apache2]
• WAMP - Provides RPC and pub/sub messaging patterns. (various implementations, various languages)
• xmlrpc-c - A lightweight RPC library based on XML and HTTP. [BSD]

JSON

•     58⭐     94🍴 Boost.PropertyTree) - A property tree parser/generator that can be used to parse XML/JSON/INI/Info files. [Boost] 🌎 website
•  11920⭐   3351🍴 cJSON) - Ultralightweight JSON parser in ANSI C. [MIT]
•    498⭐     34🍴 DAW JSON Link) - Fast, convenient JSON serialization and parsing in C++. [BSL-1.0]
•    737⭐    168🍴 frozen) - JSON parser and generator for C/C++. [GPL & GPL2]
•   2074⭐    182🍴 Glaze) - Extremely fast, in memory, JSON and interface library for modern C++. [MIT]
•   3230⭐    835🍴 Jansson) - C library for encoding, decoding and manipulating JSON data. [MIT]
•     38⭐      5🍴 jbson) - jbson is a library for building & iterating BSON data, and JSON documents in C++14. [Boost]
•    134⭐     23🍴 JeayeSON) - A very sane (header only) C++ JSON library. [BSD]
•   3904⭐    803🍴 Jsmn) - A minimalistic JSON parser in C. [MIT]
•  47021⭐   7116🍴 json) ⚡ - JSON for Modern C++. [MIT] 🌎 website
•    545⭐    175🍴 JSON++) - A JSON parser in C++. [MIT]
•    748⭐     28🍴 json.cpp) - a baroque JSON parsing / serialization library for C++. [Apache-2.0]
•    762⭐     87🍴 json.h) - A simple one header/one source solution to parsing JSON in C and C++. [Unlicense]
•     41⭐      3🍴 json-build) - C89 tiny zero-allocation JSON serializer. [MIT]
•   3156⭐   1083🍴 json-c) - A JSON implementation in C. [MIT]
•    793⭐    184🍴 jsoncons) - A C++ header-only library for JSON and JSON-like binary formats with JSONPointer, JSONPatch, JSONPath and JMESPath. [Boost]
•   8665⭐   2708🍴 JsonCpp) - A C++ library for interacting with JSON. [MIT]
•     87⭐      9🍴 Jsonifier) - A few classes for parsing and serializing objects from/into JSON - very rapidly. [MIT]
•     11⭐      1🍴 jsonParse) - A simple JSON parser in ANSI C. [MIT]
•   1309⭐    291🍴 json-parser) - Very low footprint JSON parser written in portable ANSI C. [BSD]
•   2584⭐    620🍴 json11) - A tiny JSON library for C++11. [MIT]
•    451⭐     58🍴 json-struct) - High performance, single header JSON parser parsing to and from C++ structs. [MIT]
•    128⭐     18🍴 json-voorhees) - JSON library for C++. Support for C++11. No dependencies, fast and dev-friendly. [Apache2]
•     51⭐      7🍴 JSON Toolkit) - JSON, JSON Pointer, JSON Schema, and JSONL library for C++20. [AGPL/Commercial]
•     73⭐     26🍴 jute) - Very simple C++ JSON Parser. [PublicDomain]
•    290⭐     97🍴 libjson) - A JSON parser and printer library in C. easy to integrate with any model. [LGPL]
• libjson - Lightweight JSON library. [?]
•   1684⭐    141🍴 LIBUCL) ⚡ - Universal configuration library parser. [BSD-2-Clause]
•    130⭐     25🍴 meojson) - Next-gen C++ JSON/JSON5 Serialization Engine | Zero Dependency | Header-Only | Unleash JSON Potential. [MIT]
•   1420⭐    335🍴 parson) - Parson is a lighweight json library written in C. [MIT]
•   1137⭐    221🍴 PicoJSON) - A header-file-only, JSON parser serializer in C++. [BSD]
•    330⭐    107🍴 qt-json) - A simple class for parsing JSON data into a QVariant hierarchy and vice versa. [GPLv3]
•    290⭐    144🍴 QJson) - A qt-based library that maps JSON data to QVariant objects. [LGPL2]
•  14800⭐   3613🍴 RapidJSON) ⚡ - A fast JSON parser/generator for C++ with both SAX/DOM style API. [MIT] 🌎 website
•    569⭐     44🍴 sajson) - Lightweight, extremely high-performance JSON parser for C++11. [MIT]
•  21122⭐   1107🍴 simdjson) - Extremely fast JSON library that can parse gigabytes of JSON per second. [Apache-2.0]
•    934⭐    115🍴 Sonic-Cpp) - A fast JSON serializing & deserializing library, accelerated by SIMD. [Apache-2.0]
•    655⭐     87🍴 taoJSON) - Zero-dependency C++ header-only JSON library. [MIT]
• 🌎 ujson - µjson is a a small, C++11, UTF-8, JSON library. [MIT]
•   4443⭐    372🍴 UltraJSON) - Ultra fast JSON decoder and encoder written in C. [BSD-3-Clause]
•   2197⭐    440🍴 YAJL) - A fast streaming JSON parsing library in C. [ISC]
•   3421⭐    291🍴 yyjson) - A high performance JSON library written in ANSI C. [MIT]

Logging

• 🌎 Abseil Logging - The Abseil Logging library provides facilities for writing log messages to stderr, files, or other sinks. [Apache-2.0]
•    202⭐     58🍴 Blackhole) - Attribute-based logging framework, which is designed to be fast, modular and highly customizable. [MIT]
•    199⭐    111🍴 Boost.Log) - Designed to be very modular and extensible. [Boost] 🌎 website
•    404⭐     35🍴 BqLog) - A lightweight, high-performance logging system used in projects such as "Honor of Kings". [Apache-2.0]
•   3896⭐    940🍴 Easylogging++) - Extremely light-weight high performance logging library for C++11 (or higher) applications. [MIT]
•    926⭐    143🍴 fmtlog) - A performant fmtlib-style logging library with latency in nanoseconds. [MIT]
•    934⭐    277🍴 G3log) - Asynchronous logger with Dynamic Sinks. [PublicDomain]
•   7331⭐   2099🍴 glog) - C++ implementation of the Google logging module.
•     77⭐      7🍴 haclog) - An extremely fast plain C logging library. [MIT]
• Log4cpp - A library of C++ classes for flexible logging to files, syslog, IDSA and other destinations. [LGPL]
•   1705⭐    566🍴 log4cplus) - A simple to use C++ logging API providing thread-safe, flexible, and arbitrarily granular control over log management and configuration. [BSD & Apache2]
•   1853⭐    273🍴 loguru) - A lightweight C++ logging library. [PublicDomain]
•    306⭐     31🍴 lwlog) - Very fast synchronous and asynchronous C++17 logging library. [MIT]
•     46⭐     11🍴 ng-log) - C++14 library for application-level logging. [BSD-3-Clause]
•   2414⭐    401🍴 plog) - Portable and simple log for C++ in less than 1000 lines of code. [MPL2]
•    497⭐     49🍴 reckless) - Low-latency, high-throughput, asynchronous logging library for C++. [MIT]
•  27162⭐   4898🍴 spdlog) - Super fast, header only, C++ logging library.
• templog - A very small and lightweight C++ library which you can use to add logging to your C++ applications. [Boost]
• P7Baical - An open source and cross-platform library for high-speed sending telemetry & trace data with minimal usage of CPU and memory. [LGPL]
•   2438⭐    224🍴 Quill) - Asynchronous cross platform low latency logging library. [MIT]

Machine Learning

•  34512⭐  18618🍴 Caffe) - A fast framework for neural networks. [BSD]
•   8546⭐   1234🍴 catboost) - A fast, scalable, high performance Gradient Boosting on Decision Trees library. [Apache2]
•   7164⭐   1710🍴 CCV) - C-based/Cached/Core Computer Vision Library, A Modern Computer Vision Library. [BSD]
•  26289⭐  21271🍴 darknet) - Open source neural network framework written in C and CUDA. [PublicDomain] 🌎 website
•  14121⭐   3442🍴 Dlib) ⚡ - A modern C++11 machine learning, computer vision, numerical optimization, and deep learning toolkit. [Boost] website
•  36842⭐   4016🍴 FAISS) - A library for efficient similarity search and clustering of dense vectors. [MIT]
•    457⭐     81🍴 Fido) - A highly-modular C++ machine learning library for embedded electronics and robotics. [MIT] website
•   5405⭐    499🍴 flashlight) - A fast, flexible machine learning library from Facebook AI Research written entirely in C++ and based on the ArrayFire tensor library. [BSD-3-Clause] 🌎 website
•  13088⭐   1317🍴 ggml) - Tensor library for machine learning with 16-bit and 4-bit quantization support. [MIT]
•   4658⭐   1637🍴 libsvm) - A simple, easy-to-use, efficient library for Support Vector Machines. [BSD-3-Clause] 🌎 website
•   2907⭐    249🍴 m2cgen) - A CLI tool to transpile trained classic ML models into a native C code with zero dependencies. [MIT]
•    709⭐    241🍴 MeTA) - A modern C++ data sciences toolkit. [MIT] 🌎 website
•    705⭐    172🍴 Minerva) - A fast and flexible system for deep learning. [Apache2]
•   5464⭐   1668🍴 mlpack) - A scalable c++ machine learning library. [LGPLv3] website
•  21981⭐   4315🍴 ncnn) - A high-performance neural network inference computing framework optimized for mobile platforms. [BSD]
•  83733⭐  56272🍴 OpenCV) ⚡ - Open Source Computer Vision Library. [BSD] website
•    640⭐    225🍴 oneDAL) - A powerful machine learning library that helps speed up big data analysis. [Apache]
•  17695⭐   3419🍴 ONNX runtime) - C and C++ library for training and inference ONNX models. ONNX is a standard that AI models can be converted into, regardless of the library they are trained with. [MIT] 🌎 website
•    268⭐     63🍴 Recommender) - C library for product recommendations/suggestions using collaborative filtering (CF). [BSD]
•    900⭐    229🍴 RNNLIB) - RNNLIB is a recurrent neural network library for sequence learning problems. [GPLv3]
•   3048⭐   1034🍴 SHOGUN) - The Shogun Machine Learning Toolbox. [GPLv3]
• 🌎 sofia-ml - The suite of fast incremental algorithms for machine learning. [Apache2]
•   3070⭐    217🍴 USearch) - Fast search and clustering library for vectors and strings. [Apache2]
•   1634⭐    619🍴 VLFeat) - The VLFeat open source library implements popular computer vision algorithms specialising in image understanding and local featurexs extraction and matching. [BSD-2-Clause] website
•  27286⭐   8798🍴 xgboost) - Scalable, Portable and Distributed Gradient Boosting (GBDT, GBRT or GBM) Library, for Python, R, Java, Scala, C++ and more. Runs on single machine, Hadoop, Spark, Flink and DataFlow. [Apache2]

Math

•    200⭐     31🍴 Apophenia) - A C library for statistical and scientific computing. [GPL2]
• 🌎 Armadillo - Fast C++ library for linear algebra & scientific computing. [Apache2] website
•   1839⭐    185🍴 autodiff) - A modern, fast and expressive C++ library for automatic differentiation. [MIT] 🌎 website
• 🌎 blaze - high-performance C++ math library for dense and sparse arithmetic. [BSD]
•    229⭐    127🍴 Boost.Multiprecision) - provides higher-range/precision integer, rational and floating-point types in C++, header-only or with GMP/MPFR/LibTomMath backends. [Boost] 🌎 website
• ceres-solver - C++ library for modeling and solving large complicated nonlinear least squares problems from google. [BSD]
•   5507⭐   1487🍴 CGAL) - Collection of efficient and reliable geometric algorithms. [LGPL&GPL] website
•     85⭐     16🍴 cml) - The configurable math library. [Boost]
•      ?⭐      ?🍴 CNL) - A Compositional Numeric Library for C++. [Boost]
•   1700⭐    249🍴 DirectXMath) - An all inline SIMD C++ linear algebra library for use in games and graphics apps.
•  14121⭐   3442🍴 Dlib) ⚡ - A modern C++11 machine learning, computer vision, numerical optimization, and deep learning toolkit. [Boost] website
• Eigen - A high-level C++ library of template headers for linear algebra, matrix and vector operations, numerical solvers and related algorithms. [MPL2]
• 🌎 ExprTk - The C++ Mathematical Expression Toolkit Library (ExprTk) is a simple to use, easy to integrate and extremely efficient run-time mathematical expression parser and evaluation engine. [MIT]
• 🌎 Geometric Tools - C++ library for computing in the fields of mathematics, graphics, image analysis and physics. [Boost] 🌎 website
•  10183⭐   2257🍴 GLM) - Header-only C++ math library that matches and inter-operates with OpenGL's GLSL math. [MIT] 🌎 website
• GMTL - Graphics Math Template Library is a collection of tools implementing Graphics primitives in generalized ways. [GPL2]
• 🌎 GMP - A C library for arbitrary precision arithmetic, operating on signed integers, rational numbers, and floating-point numbers. [LGPL3 & GPL2]
•    783⭐     58🍴 Klein) - A fast, SIMD-optimized C++17 Geometric Algebra library for point, line, and plane projections, intersections, joins, rigid-body motion, and more. [MIT] 🌎 website
•    817⭐    182🍴 libfixmath) - Cross Platform Fixed Point Maths Library. [MIT]
•    920⭐     72🍴 linalg.h) - Single header, public domain, short vector math library for C++. [Unlicense]
•    374⭐    104🍴 MATIO) - MATLAB MAT File I/O Library. [BSD-2-Clause] 🌎 website
•   1349⭐    104🍴 MatX) - A GPU-accelerated C++17 numerical computing library with a MATLAB/Python-like syntax. [BSD 3-clause]
•    686⭐    243🍴 MIRACL) - A Multiprecision Integer and Rational Arithmetic Cryptographic Library. [AGPL]
•   3867⭐    579🍴 NumCpp) - A templatized header only C++ implementation of the Python Numpy library. [MIT]
•     81⭐      7🍴 OMath) - Cross-platform modern general purpose math library written in C++23 that suitable for cheat/game development. [ZLIB]
• 🌎 muparser - muParser is an extensible high performance math expression parser library written in C++. [MIT]
•    753⭐    212🍴 LibTomMath) - A free open source portable number theoretic multiple-precision integer library written entirely in C. [PublicDomain & WTFPL] website
•    981⭐    142🍴 linmath.h) - A lean linear math library, aimed at graphics programming. [WTFPL]
• 🌎 lp_solve - A library used to formulate and solve linear programming problems. [LGPL] website
•   6952⭐   1585🍴 OpenBLAS) - An optimized BLAS library based on GotoBLAS2 1.13 BSD version. [BSD 3-clause] website
• 🌎 PCG-rand - PCG is a family of simple fast space-efficient statistically good algorithms for random number generation. Unlike many general-purpose RNGs, they are also hard to predict. [Apache]
•   6275⭐   2003🍴 QuantLib) - A free/open-source library for quantitative finance. [Modified BSD] website
•   1460⭐     85🍴 SimSIMD) - Vector distance functions for x86 AVX2, AVX-512, Arm NEON, and SVE. [Apache2]
•    553⭐     76🍴 StatsLib) - A C++ header-only library of statistical distribution functions. [Apache2] 🌎 website
•   1271⭐    299🍴 SymEngine) - Fast symbolic manipulation library, a rewriting of SymPy's core in C++. [MIT]
•   1746⭐    269🍴 TinyExpr) - A C library for parsing and evaluating math expressions from strings. [zlib]
•   1505⭐    153🍴 Vc) - SIMD Vector Classes for C++. [BSD]
• Versor - A (fast) Generic C++ library for Geometric Algebras, including Euclidean, Projective, Conformal, Spacetime (etc).
•    184⭐     35🍴 Wagyu) - A general library for geometry operations of union, intersections, difference, and xor. [mapbox-wagyu original]
• 🌎 Wykobi - A C++ library of efficient, robust and simple to use C++ 2D/3D oriented computational geometry routines. [MIT]
•   3597⭐    422🍴 xtensor) - A C++14 library for numerical analysis with multi-dimensional array expressions, inspired by NumPy syntax. [BSD 3-clause] 🌎 website
•    460⭐     67🍴 universal) - A C++14 header-only library implementing arbitrary posit arithmetic. The posit number system is a tapered floating point that is more efficient than IEEE floating point. Posits enable reproducible computational science. [MIT license]
•    319⭐     14🍴 utl::random) - A C++17 header-only library implementing fast random for Monte-Carlo simulations & gamedev. [MIT]
•    379⭐     45🍴 XAD) - Powerful Automatic Differentiation for C++. [AGPL] 🌎 website

Memory Allocation

•   3298⭐    427🍴 Boehm GC) - Conservative garbage collector for C and C++. [similar to X11] website
•   1684⭐    146🍴 C Smart Pointers) - Smart pointers for the (GNU) C programming language. [MIT]
•   1170⭐    132🍴 Hoard) - Fast, Scalable, and Memory-efficient Malloc for Linux, Windows, and Mac. [Apache-2.0] website
•  10331⭐   1559🍴 jemalloc) - General purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support. [BSD] website
•   1554⭐    208🍴 memory) - STL compatible C++ memory allocator library. [ZLib]
•   1871⭐    166🍴 memory-allocators) - Custom memory allocators to improve the performance of dynamic memory allocation. [MIT]
•  11893⭐    982🍴 mimalloc) - A compact general purpose allocator with excellent performance. [MIT]
•   2337⭐    200🍴 rpmalloc) - Cross platform lock free thread caching 16-byte aligned memory allocator implemented in C. [PublicDomain]
•   1719⭐    116🍴 snmalloc) - Message passing based high-performance allocator. [MIT]
•   4894⭐    524🍴 TCMalloc) - Google's fast, multi-threaded malloc implementation. [Apache-2.0] 🌎 website
•    203⭐     15🍴 buddy_alloc) - A single header buddy memory allocator for C with bounded allocation costs. [0BSD]
•   1043⭐     68🍴 tgc) - A tiny garbage collector for C written in ~500 LOC. [BSD]

Multimedia

• GStreamer - A library for constructing graphs of media-handling components. [LGPL]
•   1044⭐    232🍴 libass) - Portable subtitle renderer for the ASS/SSA subtitle format. [ISC]
•   1123⭐    399🍴 libav) - A collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata. [LGPL v2.1+ and others] 🌎 website
• LIVE555 Streaming Media - Multimedia streaming library using open standard protocols (RTP/RTCP, RTSP, SIP). [LGPL]
• 🌎 libVLC - libVLC (VLC SDK) media framework. [GPL]
•    710⭐    193🍴 MediaInfoLib) - Convenient unified display of the most relevant technical and tag data for video and audio files. [BSD]
•   4142⭐   1526🍴 QtAv) - A multimedia playback framework based on Qt and FFmpeg to write a player easily. [LGPL] website
•  13525⭐   2332🍴 SDL) ⚡ - Simple DirectMedia Layer. [zlib] 🌎 website
•  11254⭐   1836🍴 SFML) ⚡ - Simple and Fast Multimedia Library. [zlib] website
•   1315⭐    359🍴 TagLib) - A library for reading and editing the metadata of several popular audio formats. [LGPL/MPL] 🌎 website

Networking

•   1582⭐    110🍴 ada) - WHATWG-compliant and fast URL parser written in modern C++. [Apache-2.0/MIT]
• ACE - An OO Network Programming Toolkit in C++. [?MIT?]
•   1422⭐    446🍴 Boost.Asio) ⚡ - A cross-platform C++ library for network and low-level I/O programming. [Boost] 🌎 website
•   4618⭐    665🍴 Boost.Beast) ⚡ - HTTP and WebSocket built on Boost.Asio in C++11. [Boost] 🌎 website
•    145⭐     22🍴 Breep) - Event based, high-level C++14 peer-to-peer library. [EUPL-1.1 (OSI approved)]
•   8213⭐   1689🍴 C++ REST SDK) - C++ REST SDK (previously named Casablanca). [Apache2]
•   1974⭐    379🍴 Restbed) - C++11 Asynchronous RESTful framework. [AGPL]
•   1244⭐    103🍴 Restinio) - A header-only C++14 library that gives you an embedded HTTP/Websocket server. [BSD]
•   2008⭐    635🍴 c-ares) - A C library for asynchronous DNS requests. [MIT]
•  14858⭐   2484🍴 cpp-httplib) - A single file C++11 header-only HTTP/HTTPS server library. [MIT]
• cpp-netlib - A collection of open-source libraries for high level network programming. [Boost]
•    140⭐     73🍴 cpp-netlib/uri) - URI parser/builder library for C++, compatible with RFC 3986 and RFC 3987. [Boost]
•   1568⭐    304🍴 CppServer) - Ultra fast and low latency asynchronous socket server & client C++ library with support TCP, SSL, UDP, HTTP, HTTPS, WebSocket protocols and 10K connections problem solution. [MIT]
•   7057⭐   1006🍴 cpr) - A modern C++ HTTP requests library with a simple but powerful interface. Modeled after the Python Requests module. [MIT] 🌎 website
•    661⭐    180🍴 curlcpp) - An object oriented C++ wrapper for CURL(libcurl). [MIT]
•   1760⭐    372🍴 curlpp) -C++ wrapper around libcURL. [MIT]
•   3887⭐   1354🍴 DPDK) - Data Plane Development Kit, libraries and drivers for fast packet processing. [BSD-3-Clause & GPL-2.0] 🌎 website
•   1452⭐    224🍴 Dyad.c) - Asynchronous networking for C. [MIT]
•   2999⭐    709🍴 ENet) - Reliable UDP networking library. [MIT] website
•   3715⭐    952🍴 evpp) - C++ high performance networking with TCP/UDP/HTTP protocols. [BSD]
•    223⭐     71🍴 FTP client for C++) - C++ client for making FTP requests. [MIT]
•  11186⭐    863🍴 H2O) - An optimized HTTP server with support for HTTP/1.x and HTTP/2. It can also be used as a library. [MIT]
•   6420⭐   1532🍴 HTTP Parser) ⚡ - A http request/response parser for C. [MIT]
•  16297⭐   2571🍴 KCP) - A fast and reliable ARQ protocol that helps applications to reduce network latency. [MIT]
• libcurl - Multiprotocol file transfer library. [MIT/X derivate license]
•    931⭐    193🍴 libhttpserver) - C++ library for creating an embedded Rest HTTP server (and more). [LGPL2.1]
• Libmicrohttpd - GNU libmicrohttpd is a small C library that is supposed to make it easy to run an HTTP server as part of another application. [LGPL v2.1+]
•   2947⭐    895🍴 libpcap) - A portable C/C++ library for network traffic capture. [BSD] 🌎 website
•   1816⭐    289🍴 libquic) - A QUIC protocol library extracted from Chromium's QUIC Implementation. [BSD]
•    755⭐   3217🍴 librdkafka) - Apache Kafka client library for C and C++. [BSD-2-Clause]
•   5076⭐   1557🍴 libwebsockets) - A lightweight pure C WebSocket implementation that provides both client and server libraries. [LGPL2.1 + static link exception] 🌎 website
• 🌎 Lithium - Build high performance C++ HTTP servers without being a C++ expert. [MIT]
• lwIP - A lightweight TCP/IP stack. [Modified BSD]
•    443⭐    113🍴 mailio) - mailio is a cross platform C++ library for MIME format and SMTP, POP3 and IMAP protocols. [BSD]
•  12102⭐   2830🍴 Mongoose) - Extremely lightweight webserver. [GPL2]
•    846⭐    289🍴 MQTT-C) - A portable MQTT C client for embedded systems and PCs alike. [MIT] 🌎 website
•   2077⭐    456🍴 mTCP) - Highly scalable user-level TCP stack for multicore systems. [Modified BSD]
•  15557⭐   5285🍴 Muduo) - A C++ non-blocking network library for multi-threaded server in Linux. [BSD]
•   4845⭐    914🍴 nghttp2) - HTTP/2 C Library. [MIT] 🌎 website
•    970⭐    110🍴 nghttp3) - HTTP/3 library written in C. [MIT] 🌎 website
•   2063⭐    256🍴 Onion) - HTTP server library in C designed to be lightweight and easy to use. [Apache2/GPL2]
•   2860⭐    360🍴 PF_RING™) - High-speed packet processing framework. [LGPL-2.1] 🌎 website
•   1961⭐    263🍴 PicoHTTPParser) - A tiny, primitive, fast HTTP request/response parser. [MIT]
• POCO ⚡ - C++ class libraries and frameworks for building network- and internet-based applications that run on desktop, server, mobile and embedded systems. [Boost] website
•   8278⭐   1530🍴 Proxygen) - Facebook's collection of C++ HTTP libraries including an easy to use HTTP server. [BSD]
•  10835⭐    665🍴 RedPanda) - Streaming data platform for developers. Kafka API compatible. 10x faster. [BSL]
•   3390⭐   1051🍴 RakNet) - A cross platform, open source, C++ networking engine for game programmers. [BSD]
•   1601⭐    382🍴 restclient-cpp) - Simple REST client for C++. It wraps libcurl for HTTP requests. [MIT]
•    763⭐    127🍴 Seasocks) - Simple, small, C++ embeddable webserver with WebSockets support. [BSD]
•    638⭐     97🍴 tlse) - Single C file TLS 1.2/1.3 implementation, using tomcrypt as crypto library [BSD-2-Clause]
•   1304⭐    133🍴 TQUIC) - A high-performance, lightweight, and cross-platform QUIC library, exposed to C and C++. [Apache2]
•    595⭐    181🍴 Tufão) - An asynchronous web framework for C++ built on top of Qt. [LGPL2]
•    370⭐     87🍴 uriparser) - Strictly RFC 3986 compliant URI parsing and handling library. [BSD-3-Clause]
•  18220⭐   1816🍴 uWebSockets) - µWS is one of the most lightweight, efficient & scalable WebSocket & HTTP server implementations available. [Zlib]
•   1248⭐     51🍴 UCall) - A high-performance SIMD-accelerated RPC library on io_uring. [Apache2]
•    691⭐     68🍴 WAFer) - A C language-based ultra-light software platform for scalable server-side and networking applications. Think node.js for C programmers. [GPL2]
•   3088⭐    547🍴 Wangle) - A client/server application framework to build asynchronous, event-driven modern C++ services. [Apache-2.0]
•   2914⭐    393🍴 wdt) - An embeddedable library (and command line tool) aiming to transfer data between 2 systems as fast as possible over multiple TCP paths. [BSD-3-Clause]
•   7465⭐   2056🍴 WebSocket++) - C++/Boost Asio based websocket client/server library. [BSD]
•   2982⭐    720🍴 PcapPlusPlus) - a multiplatform C++ network sniffing and packet parsing and crafting framework. [Unlicense]
•  10464⭐   2434🍴 ZeroMQ) - High-speed, modular asynchronous communication library. [LGPL3/MPL2] website

Office Open XML

Libraries for parsing and manipulating xlsx, pptx, docx, etc.

•    464⭐    121🍴 DuckX) - C++ library for creating and modifying Microsoft Word (.docx) files. [MIT]
• 🌎 FreeXL - an open source library to extract valid data from within Spreadsheets. [MPL/GPL-2/LGPL-2]
•    493⭐    140🍴 libxls) - Read binary Excel files from C/C++ [BSD-2-Clause]
•   1662⭐    364🍴 libxlsxwriter) - A C library for creating Excel XLSX files. [BSD-2-Clause] 🌎 website
•   1601⭐    371🍴 OpenXLSX) - A C++ library for reading, writing, creating and modifying Microsoft Excel® (.xlsx) files. [BSD-3-Clause]
• 🌎 SimpleXlsxWriter - XLSX files writer for Microsoft Excel 2007 and above. [zlib]
•    491⭐    126🍴 XLSX I/O) - C library for reading and writing .xlsx files. [MIT]

PDF

Libraries for parsing and manipulating PDF documents.

•   1885⭐    528🍴 libharu) - A free, cross platform, open-sourced software library for generating PDF. [zlib]
• 🌎 litePDF - Library to create and edit PDF documents that uses GDI functions through a device context to draw the page content. [LGPL v3 and zlib]
• 🌎 MuPDF - A lightweight PDF, XPS, and E-book viewer. [AGPL/Proprietary]
•    973⭐    226🍴 PDF-Writer) - High performance library for creating, modiyfing and parsing PDF files in C++ [Apache-2.0] 🌎 website
•    275⭐     58🍴 pdfio) - A simple C library for reading and writing PDF files. [Apache-2] 🌎 website
• 🌎 PDFium - PDF generation and rendering library. [BSD-3-Clause]
• PoDoFo - A library to work with the PDF file format. [LGPL]
• 🌎 Poppler - Open-source multi-backend PDF rendering library based on the xpdf-3.0 code base. [GPLv2/GPLv3]
•   4221⭐    322🍴 QPDF) - A tool and C++ library for content-preserving transformations of PDF files. [Apache-2.0] 🌎 website
• 🌎 Xpdf - Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. [GPL v2/GPL v3]
• DynaPDF - An easy-to-use PDF generation library. [Commercial]

Physics

Dynamics simulation engines

•   9112⭐   1674🍴 Box2D) - A 2D physics engine for games. [BSD-like]
•  13676⭐   2979🍴 Bullet) - A 3D physics engine for games. [zlib] website
•   2328⭐    361🍴 Chipmunk) - A fast and lightweight 2D game physics library. [MIT] 🌎 website
•   8376⭐    558🍴 Jolt Physics) - A multi core friendly rigid body physics and collision detection library. [MIT]
•   1162⭐    268🍴 Kratos) - framework for building parallel, multi-disciplinary simulation software, aiming at modularity, extensibility, and high performance. [BSD] website
•   4858⭐    650🍴 LiquidFun) - A 2D physics engine for games. [BSD-like]
•    999⭐    193🍴 Newton Dynamics) - An integrated solution for real time simulation of physics environments. [zlib]
• ODE - Open Dynamics Engine - An open source, high performance library for simulating rigid body dynamics. [BSD&LGPL]
•    325⭐    124🍴 ofxBox2d) - openFrameworks wrapper for Box2D. [BSD-like]
•   2386⭐    283🍴 PhysX) - An open-source realtime physics engine middleware SDK developed by Nvidia as a part of Nvidia GameWorks software suite. [BSD-3-Clause]
•    140⭐     27🍴 PlayRho) - An interactive physics engine & library. [Zlib]
•   2510⭐    518🍴 Project Chrono) - An open source multi-physics simulation engine. [BSD-3-Clause] 🌎 website
•    621⭐    132🍴 Quantum++) - A modern C++11 quantum computing library. [MIT]
•    257⭐     10🍴 QuarkPhysics) - A 2D Soft Body and Rigid Body Physics Engine. [MIT]
•   2445⭐    484🍴 Simbody) - High-performance C++ multibody dynamics/physics library for simulating articulated biomechanical and mechanical systems like vehicles, robots, and the human skeleton. [Apache2]
•   1058⭐    333🍴 SOFA) - SOFA is an open-source framework targeting at real-time simulation, with an emphasis on medical simulation. [LGPL] 🌎 website

Reflection

•    239⭐     39🍴 config-loader) - A C++17 static reflection framework, from parse configuration file to native data structure. [MIT]
•   1785⭐    181🍴 Better Enums) - Reflective enums (to string, iteration). Single header. [BSD] website
•    279⭐     29🍴 clReflect) - C++ Reflection using clang. [MIT]
•    219⭐     60🍴 CPFG) - A C++03 library for reflection, callback and script binding. [Apache2]
•    697⭐     99🍴 CPP-Reflection) - C++ Reflection using clang. [MIT]
•    102⭐      7🍴 Easy Reflection) - Easy and fast reflection + serialization solution like in Rust, Java or Go. [Apache]
•   5646⭐    502🍴 Magic Enum) - Header-only C++17 library provides static reflection for enums (to string, from string, iteration), work with any enum type without any macro or boilerplate code. [MIT]
•    216⭐     13🍴 magic_get) - std::tuple like methods for user defined types without any macro or boilerplate code. [Boost]
•    642⭐     52🍴 meta) - Header-only, non-intrusive and macro-free runtime reflection system in C++. [MIT]
•   2229⭐    119🍴 Nameof) - Header-only C++17 library provides nameof macros and functions to obtain the simple name of variable, type, function, macro, and enum. [MIT]
•    664⭐    100🍴 Ponder) - A C++11 library for reflection. [MIT]
•    450⭐     22🍴 REFLECT) - C++20 Static Reflection library. [MIT]
•   1539⭐    138🍴 reflect-cpp) - Serialization through reflection, including automatic field name retrieval from structs. [MIT]
•   3371⭐    463🍴 RTTR) - A C++11 library for reflection. [MIT] website
•     39⭐      2🍴 simple_enum) - An Fast, Intuitive and Type-Safe C++ Enumeration Support Library. [BSL-1.0] 🌎 website
•    102⭐     11🍴 TSMP) - An intrusion and macro-free C++20 library for static reflection. It uses libclang to extract reflection data from your source code and makes it usable via template specialization. [MIT]
•    584⭐     52🍴 visit_struct) - A miniature library for struct-field reflection in C++. [Boost]
•    243⭐     22🍴 Refureku) - A C++17 runtime reflection and code generation library. [MIT]

Regular Expression

•    390⭐     50🍴 CppVerbalExpressions) - C++ regular expressions made easy. [MIT]
•   3650⭐    199🍴 CTRE) - A Compile time PCRE (almost) compatible regular expression matcher. [MIT]
•   5082⭐    751🍴 Hyperscan) - Hyperscan is a high-performance multiple regex matching library by Intel. Provides simultaneous matching of large numbers of regexps (up to tens of thousands). Typically used in a DPI library stack. [BSD]
•   2468⭐    335🍴 Oniguruma) - A modern and flexible regular expressions library that supports a variety of character encodings. [BSD]
• PCRE - A regular expression C library inspired by the regular expression capabilities in Perl. [BSD]
•    335⭐     30🍴 PIRE) - Perl Incompatible Regular Expressions library by Yandex. Can be really fast (more than 400 MB/s). [LPGL v3.0]
•   9409⭐   1174🍴 RE2) - A software library for regular expressions via a finite-state machine using automata theory. [BSD-3-Clause]
•    543⭐    116🍴 SLRE) - Super Light Regexp engine for C/C++. [GPLv2/Proprietary]
•    625⭐    108🍴 sregex) - A non-backtracking NFA/DFA-based Perl-compatible regex engine library for matching on large data streams. [BSD]
• 🌎 SRELL - Unicode-aware regular expression template library for C++. [BSD]
•    589⭐     61🍴 Vectorscan) - A portable fork of the high-performance regular expression matching library. [BSD-3-Clause] 🌎 website

Robotics

• MOOS-IvP - A set of open source C++ modules for providing autonomy on robotic platforms, in particular autonomous marine vehicles.
• MRPT - Mobile Robot Programming Toolkit. [BSD]
•  10591⭐   4669🍴 PCL) - Point Cloud Library is a standalone, large scale, open project for 2D/3D image and point cloud processing. [BSD] website
• Robotics Library (RL) - A self-contained C++ library for robot kinematics, motion planning and control. [BSD]
• 🌎 RobWork - A collection of C++ libraries for simulation and control of robot systems. [Apache2] website
• ROS - Robot Operating System provides libraries and tools to help software developers create robot applications. [BSD]
•    967⭐    211🍴 Ruckig) - Real-time motion generation for robots and machines. [MIT] 🌎 website
•    571⭐    207🍴 YARP (Yet Another Robot Platform)) - Library and toolkit for communication and device interfaces. [BSD-3-Clause] website
•     31⭐     10🍴 SPICE Toolkit) - Library and toolkit for computing geometric information used in planning and analyzing science observations obtained from robotic spacecraft. [MIT] 🌎 website

Scientific Computing

•    805⭐    129🍴 AMGCL) - a header-only C++ library for solving large sparse linear systems with algebraic multigrid. [MIT]
•    383⭐     27🍴 Au) - A C++14-compatible physical units library with no dependencies and a single-file delivery option. Emphasis on safety, accessibility, performance, and developer experience. [Apache 2.0] 🌎 website
• FFTW - A C library for computing the DFT in one or more dimensions. [GPL]
• GSL - GNU scientific library. [GPL]
•    824⭐    196🍴 preCICE) - Coupling library for partitioned multi-physics simulations (FSI, CHT, and more). [LGPL] 🌎 website
•   1978⭐    196🍴 TileDB) - Fast Dense and Sparse Multidimensional Array DBMS. [MIT] 🌎 website
•   1310⭐    594🍴 Trilinos) - High performance PDE solvers. [BSD]
•   9063⭐   2370🍴 Torch) - A scientific computing framework with wide support for machine learning algorithms that puts GPUs first. [BSD-3-Clause] website

Scripting

• 🌎 AngelScript - AngelScript is a game-oriented interpreted/compiled scripting language. [zlib]
•    505⭐    217🍴 Boost.Python) - A C++ library which enables seamless interoperability between C++ and the Python programming language. [Boost] 🌎 website
•   1218⭐     72🍴 cppimport) - Import C++ files directly from Python! [MIT]
•   3267⭐    530🍴 CppSharp) - Tools and libraries to glue C/C++ APIs to high-level languages. [MIT]
•      ?⭐      ?🍴 ChaiScript) - An easy to use embedded scripting language for C++. [BSD] website
•   2144⭐     94🍴 ctypes.sh) - A foreign function interface for bash. [MIT]
•  10240⭐   1551🍴 Cython) - Cython is an optimising static compiler for both the Python programming language and the extended Cython programming language (based on Pyrex). It makes writing C extensions for Python as easy as Python itself. [Apache] website
• 🌎 djinni - A tool for generating cross-language type declarations and interface bindings. [Apache2]
•   6112⭐    532🍴 Duktape) - An embeddable JavaScript engine with compact footprint. [MIT] website
•   4635⭐    591🍴 JavaCpp) - The missing bridge between Java and native C++. [Apache2]
•   7284⭐    684🍴 JerryScript) - Ultra-lightweight JavaScript engine for the Internet of Things. [Apache-2.0] 🌎 website
•   3449⭐    752🍴 libffi) - A portable foreign-function interface library. [MIT] 🌎 website
• Lua - A minimal and fast scripting engine for configuration files and basic application scripting. [MIT]
•   1703⭐    355🍴 LuaBridge) - A lightweight, dependency-free library for binding Lua to C++. [MIT]
•    303⭐     43🍴 LuaBridge3) - A lightweight, dependency-free library for binding Lua, LuaJIT, Luau and Ravi to C++. [MIT]
•    157⭐     23🍴 luacxx) - C++11 API for creating Lua bindings. [MIT]
•   4747⭐    454🍴 Luau) - A fast, small, safe, gradually typed embeddable scripting language derived from Lua. [MIT] 🌎 website
• 🌎 MiniScript - scripting language modern, elegant, easy to learn, and easy to embed in your own C# or C++ projects. [MIT]
•   2972⭐    250🍴 nanobind) - tiny and efficient C++/Python bindings. [BSD-3-Clause]
•   1990⭐    118🍴 nbind) - Magical headers that make your C++ library accessible from JavaScript. [MIT]
•   1443⭐    341🍴 PHP-CPP) - A library to build PHP extensions with C++. [Apache2] website
•   1909⭐    147🍴 pocketpy) - C++17 header-only Python interpreter for game scripting. [MIT] 🌎 website
•  17201⭐   2212🍴 pybind11) - Seamless operability between C++11 and Python. [BSD]
• 🌎 QuickJS - a small and embeddable JavaScript engine. [MIT]
• 🌎 SIP - C or C++ Bindings Generator for Python v2 and v3. [GPL]
•   4671⭐    564🍴 sol2) - A C++ <-> Lua API wrapper with advanced features and top notch performance. [MIT]
•   6104⭐   1277🍴 SWIG) - A wrapper/interface Generator that let you link your c++ code to JavaScript, Perl, PHP, Python, Tcl and Ruby. [GPL/Output not licensed] website
•   2777⭐    187🍴 txiki.js) - A tiny JavaScript runtime. [MIT]
•   1441⭐    179🍴 V7) - An embedded JavaScript engine. [GPL2]
• 🌎 V8 - A fast JavaScript engine by Google that can be embedded into any C++ application. [BSD]
•    941⭐    122🍴 v8pp) - Header-only library to expose C++ classes and functions into V8 to use them in JavaScript code. [BOOST] 🌎 website
•   9203⭐   1205🍴 ChakraCore) -A JavaScript engine by Microsoft that can be embedded into nodejs. [MIT]

Serialization

•     20⭐      6🍴 BitSerializer) - Multi-format serialization library (JSON, XML, YAML, CSV, MsgPack) [MIT]
•   1171⭐     95🍴 Bitsery) - Header only C++ binary serialization library. [MIT]
•   2633⭐    332🍴 Bond) - An open source, cross-platform framework for working with schematized data. [MIT]
•    128⭐    147🍴 Boost.Serialization) - Boost Serialization Library. [Boost] 🌎 website
•  12395⭐    977🍴 Cap'n Proto) - Fast data interchange format and capability-based RPC system. [MIT] 🌎 website
•   4503⭐    810🍴 cereal) - A C++11 library for serialization. [BSD]
•   2088⭐    143🍴 cista) - A C++17 library for zero-copy high-performance (de-)serialization. [MIT]
•    668⭐    116🍴 cppcodec) - Header-only C++11 library to encode/decode base64, base32 and hex with consistent, flexible API. [MIT]
•    926⭐     94🍴 FastBinaryEncoding) - Fast Binary Encoding is ultra fast and universal serialization solution for C++, C#, Go, Java, JavaScript, Kotlin, Python, Ruby, Swift. [MIT]
•  24689⭐   3383🍴 FlatBuffers) - A Memory efficient serialization library. [Apache2]
• Kaitai Struct - A declarative language to describe various binary data structures and a compiler to generate C++ parser code. [GPLv3+][MIT][Apache2]
•   1261⭐    241🍴 iguana) - a modern, universal and easy-to-use serialization engine developed in C++20 and C++17. [Apache2]
•   3193⭐    909🍴 MessagePack) - Efficient binary serialization format "like JSON" for C and C++. [Apache2] website
•      ?⭐      ?🍴 mrpt-serialization) - Versioned serialization to binary or text formats. [BSD] 🌎 website
•   4851⭐    938🍴 nanopb) - Small code-size Protocol Buffers implementation in ANSI C. [Zlib]
•  68918⭐  15854🍴 protobuf) - Protocol Buffers - Google's data interchange format. [BSD]
•   2858⭐    749🍴 protobuf-c) - Protocol Buffers implementation in C. [BSD]
•    186⭐     17🍴 Protocol Puffers) - A little, highly templated, and protobuf-compatible serialization/deserialization header-only library written in C++20. [Apache-2.0]
•   3298⭐    548🍴 SimpleBinaryEncoding) - encoding and decoding application messages in binary format for low-latency applications. [Apache2]
•   1514⭐    265🍴 upb) - A small protobuf implementation in C. [BSD]
•    281⭐     60🍴 Wirehair) - O(N) Fountain Code for Large Data. [BSD-3-Clause]
•    764⭐    101🍴 YAS) - Very fast Yet Another Serialization library supports the binary/text/json formats. [Boost]
•    870⭐     68🍴 zpp_bits) - Actually, the fastest modern Serialization library. Just check 🌎 this video.

Serial Port

•      ?⭐      ?🍴 Asio) - Asio includes classes for creating and manipulating serial ports in a portable manner. [Boost] website
•   1422⭐    446🍴 Boost.Asio) - Boost.Asio includes classes for creating and manipulating serial ports in a portable manner. [Boost] 🌎 website
•    847⭐    359🍴 CSerialPort) - lightweight cross-platform serial port library. [LGPL3]
•    472⭐    147🍴 Libserial) - Serial Port Programming in C++. [BSD-3-Clause]
•   2310⭐   1121🍴 Serial Communication Library) - Cross-platform, Serial Port library written in C++. [MIT] website

Sorting

•    668⭐     61🍴 cpp-sort) - Sorting algorithms & related tools for C++14. [MIT]

•   2438⭐     99🍴 pdqsort) - Pattern-defeating quicksort. [zlib]
•    309⭐     45🍴 Timsort) - A templated stable sorting function which outperforms quicksort-based algorithms including std::sort, for reversed or semi-sorted data. [MIT]
•     20⭐      2🍴 Indiesort) - A sort wrapper which enables the use of std::sort (& other random-access sort functions) with non-random-access containers, and also improves sort performance for large/non-trivially-copyable types in random-access containers and arrays. [zLib] 🌎 website

Video

• libvpx - VP8/VP9 Codec SDK. [BSD]
• 🌎 FFmpeg - A complete, cross-platform solution to record, convert and stream audio and video. [LGPL2/GPL2]
•    514⭐     92🍴 avcpp) - Modern C++ wrapper around FFmpeg. [MIT]
•   1817⭐    474🍴 libde265) - Open h.265 video codec implementation. [LGPL] website
• 🌎 x265 - Open h.265 video codec implementation. [GPL2] 🌎 website
•   5814⭐   1844🍴 OpenH264) - Open Source H.264 Codec. [BSD] website
• Theora - A free and open video compression format. [BSD]
•      ?⭐      ?🍴 Vireo) - A lightweight and versatile video processing library by Twitter. [MIT]

Virtual Machines

•    985⭐     82🍴 CarpVM) - "interesting" VM in C. Let's see how this goes. [GPLv3]
•  20770⭐   8391🍴 MicroPython) - Aims to put an implementation of Python 3.x on a microcontroller. [MIT]
•   3270⭐    304🍴 TinyVM) - A small, fast, lightweight virtual machine written in pure ANSI C. [MIT]

Web Application Framework

•   3183⭐   1002🍴 Civetweb) - Provides easy to use, powerful, C/C++ embeddable web server with optional CGI, SSL and Lua support. [MIT]
•   8213⭐   1689🍴 C++ REST SDK) - Microsoft project for cloud-based client-server communication in native code using a modern asynchronous C++ API design. [MIT]
• CppCMS - A Free High Performance Web Development Framework (not a CMS). [LGPLv3]
•   4132⭐    473🍴 Crow) - Crow is a C++ microframework for running web services. It uses routing similar to Python's Flask. [BSD] 🌎 website
•    955⭐    121🍴 Cutelyst) - A C++ Web Framework built on top of Qt, using the simple approach of Catalyst (Perl) framework. [BSD-3-Clause] 🌎 website
•  12860⭐   1226🍴 Drogon) - A C++17/20 based, high-performance HTTP application framework. [MIT]
•    976⭐    144🍴 C++ wfrest) - C++ Web Framework REST API. [Apache2]
•   2317⭐    144🍴 facil.io) - Evented, high performance C web framework supporting HTTP, WebSockets, SSE and more. [MIT] website
• 🌎 Kore - ultra fast and flexible web server / framework for web applications developed in C. [ISC]
• libOnion - lightweight library to help you create webservers in C programming language. [LGPLv3]
•   5984⭐    550🍴 lwan) - Experimental, scalable, high performance HTTP server. [GPL2]
•   8349⭐   1342🍴 oat++) - Light, zero-dependency framework to create high-performance web-services. [Apache-2.0] 🌎 website
• 🌎 Pistache - Pistache is a C++ REST framework written in pure C++11 with no external dependency. [Apache2]
•      ?⭐      ?🍴 QDjango) - A web framework written in C++ and built on top of the Qt library. Where possible it tries to follow django's API, hence its name. [LGPL]
•   1347⭐    226🍴 TreeFrog Framework) - High-speed and full-stack web application framework based on C++ and Qt, which supports HTTP and WebSocket protocol (with O/R mapping). [BSD] website
•   2689⭐    340🍴 userver) - Asynchronous C++17 framework with a rich set of abstractions and database drivers for fast and comfortable creation of efficient microservices, services and utilities. [Apache-2.0] 🌎 website
• Wt - A C++ library for developing web applications. [GPL/Proprietary]

XML

XML is crap. Really. There are no excuses. XML is nasty to parse for humans, and it's a disaster to parse even for computers. There's just no reason for that horrible crap to exist. - Linus Torvalds

•     58⭐     94🍴 Boost.PropertyTree) - A property tree parser/generator that can be used to parse XML/JSON/INI/Info files. [Boost] 🌎 website
• Expat - An XML parser library written in C. [MIT]
• Libxml2 - The XML C parser and toolkit of Gnome. [MIT]
• libxml++ - An XML Parser for C++. [LGPL2]
•    486⭐    174🍴 Mini-XML) - A small XML parsing library written in ANSI C. [LGPL2 with exceptions]
• PugiXML - A light-weight, simple and fast XML parser for C++ with XPath support. [MIT]
• RapidXml - An attempt to create the fastest XML parser possible, while retaining useability, portability and reasonable W3C compatibility. [Boost]
• TinyXML - A simple, small, minimal, C++ XML parser that can be easily integrating into other programs. [zlib]
•   5484⭐   1898🍴 TinyXML2) - A simple, small, efficient, C++ XML parser that can be easily integrating into other programs. [zlib]
•     92⭐     35🍴 TinyXML++) - A completely new interface to TinyXML that uses MANY of the C++ strengths. Templates, exceptions, and much better error handling. [MIT]
•     33⭐     32🍴 Xalan C) - A library and a command line program to transform XML documents using a stylesheet that conforms to XSLT 1.0 standards. [Apache-2.0] 🌎 website
• Xerces-C++ - A validating XML parser written in a portable subset of C++. [Apache2]

Yaml

•    111⭐     15🍴 fkYAML) - A C++ header-only YAML library. [MIT]
•    298⭐     61🍴 LibCYAML) - C library for reading and writing YAML. [ISC]
•    287⭐     80🍴 libfyaml) - A fancy 1.2 YAML and JSON parser/writer. [MIT]
•   1075⭐    347🍴 LibYAML) - A C library for parsing and emitting YAML. [MIT] 🌎 website
•    232⭐     43🍴 mini-yaml) - Single header YAML 1.0 C++11 serializer/deserializer. [MIT]
•    668⭐    116🍴 rapidyaml) - Rapid YAML is a C++ library to parse and emit YAML. [MIT]
•   5611⭐   2006🍴 yaml-cpp) - A YAML parser and emitter in C++. [MIT]

Miscellaneous

Useful libraries or tools that don't fit in the categories above or maybe just not categorised yet

•     77⭐     10🍴 access_profiler) - A tool to count accesses to member variables in c++ programs. [GPL3]
• American fuzzy lop a.k.a. afl-fuzz - Crazy fuzzing tool that automatically discovers bugs given time and minimal example input. [Apache2]
•   5060⭐    437🍴 Argon2) - The password hash Argon2, winner of PHC. [CC0/Apache2]
•   4264⭐    538🍴 AsmJit) - Low-latency machine code generation. [Zlib] 🌎 website
• Better String - An alternative to the string library for C which is more functional and does not have buffer overflow overrun problems. Also includes a C++ wrapper. [BSD, GPL2]
•     82⭐     60🍴 Boost.Signals2) - An implementation of a managed signals and slots system. [Boost] 🌎 website
• 🌎 casacore - A set of c++ core libraries derived from aips++. [LGPL]
•    620⭐    174🍴 CCTZ) - a C++ library for translating between absolute and civil times using the rules of a time zone. [Apache-2.0]
• 🌎 Cheat Sheets of HackingCPP - Cool cheat sheets and infographics for algorithms, views, containers, randomness, etc.
•    570⭐     31🍴 Concord) - A Discord API wrapper library written in C. [MIT] 🌎 website
•   1417⭐    119🍴 CPPItertools) - Range-based for loop add-ons inspired by the Python builtins and itertools library. [BSD-2-Clause]
•    417⭐    121🍴 CPP-JWT) - JSON Web Token library for C++. [MIT]
•    361⭐     16🍴 cpp-lazy) - a fast and easy lazy evaluation library for C++11/14/17/20. [MIT]
•    383⭐     99🍴 CRCpp) - Easy to use and fast C++ CRC library. [BSD-3-Clause]
•    565⭐     71🍴 cxx-prettyprint) - A pretty printing library for C++ containers. [Boost]
•   3293⭐    711🍴 date) - A date and time library based on the C++11/14/17 header. [MIT] 🌎 website
•   1234⭐    176🍴 D++ (DPP)) - A lightweight, high performance and scalable C++ library for creating Discord Bots. [Apache2] 🌎 website
•    685⭐     46🍴 DynaMix) - A library which allows you to compose and modify objects at run time. [MIT]
•    170⭐      8🍴 emio) - A safe and fast high-level and low-level character input/output library. [MIT]
•    378⭐    179🍴 faker-cxx) - C++20 Faker library for generating fake (but realistic) data for testing and development. [MIT]
•   1858⭐    159🍴 fast_float) - Fast, Exact C++ from_chars, 4x to 10x faster than strtod, part of GCC 12, Chromium, Redis, Webkit/Safari. [Apache2/BSL-1.0/MIT]
• FastFormat - Fast, Safe C++ Formatting inspired by log4j and Pantheios. [Simplified BSD]
•    789⭐     68🍴 fast_io) - Significantly faster input/output for C++20. [MIT]
•    379⭐     18🍴 fccf) - A command-line tool that recursively searches a directory to find C/C++ source code matching a search string. [MIT]
•  22279⭐   2689🍴 {fmt}) ⚡ - Small, safe and fast formatting library for C++. [Simplified BSD] 🌎 website
•    192⭐     19🍴 gcc-poison) - A simple header file for developers to ban unsafe C/C++ functions from applications.
•    362⭐     73🍴 happly) - A C++ header-only parser for the PLY file format. Parse .ply happily! [MIT]
•    869⭐     55🍴 hedley) - A C/C++ header file designed to smooth over some platform-specific annoyances. 🌎 website
•    280⭐      7🍴 Hexi) - Header-only, lightweight C++ library for binary streaming & serialization. [Apache-2.0/MIT]
•   1585⭐    187🍴 HighwayHash) - Fast strong hash functions: SipHash/HighwayHash. [Apache-2.0]
•   1844⭐    227🍴 inja) - A Template Engine for Modern C++. [MIT]
•    558⭐    102🍴 Jinja2С++) - almost full-conformance template engine implementation. 🌎 website
•   1037⭐    275🍴 jwt-cpp) - A header only library for creating and validating JSON web tokens in C++. [MIT]
•    529⭐     40🍴 Kangaru) - A dependency injection container for C++11 and C++14. [MIT]
•   4471⭐    576🍴 Klib) - Small and lightweight implementations of common algorithms and data structures. [MIT]
•    251⭐      9🍴 KOMIHASH) - Very fast, high-quality hash function, discrete-incremental and streamed hashing-capable. [MIT]
•    492⭐    117🍴 libcpuid) - A small C library for x86 CPU detection and feature extraction. [BSD]
•    146⭐     12🍴 libenvpp) - A modern C++ library for type-safe environment variable parsing. [Apache-2.0]
•     30⭐     14🍴 libevil) - The Evil License Manager. [GPLv3]
•     90⭐     27🍴 libnih) - A lightweight library of C functions and structures. [GPL2.1]
•    190⭐     50🍴 libONVIF) - Yet another ONVIF library. [GPL-3.0]
•    350⭐     40🍴 libpopcnt) - Fast C/C++ bit population count library. [BSD-2-Clause]
•    414⭐     73🍴 libsigc++) - A typesafe callback system for standard C++. [LGPL] 🌎 website
• 🌎 libusb - A universal USB library which allows for portable access to USB devices. [LGPL2]
•   1301⭐     77🍴 Mach7) - A Pattern-matching library for C++. [BSD]
•    170⭐     20🍴 minja.hpp) - A minimalistic C++ Jinja templating engine for LLM chat templates. [MIT]
•   1856⭐    167🍴 mio) - Cross-platform C++11 header-only library for memory mapped file IO. [MIT]
•    699⭐     90🍴 MPark.Variant) - C++17 std::variant for C++11/14/17. [BSL-1.0]
•    230⭐     17🍴 MPH) - C++20 [Minimal] Static Perfect Hash library. [MIT]
•   2051⭐    244🍴 PEGTL) - The Parsing Expression Grammar Template Library. [MIT]
•    831⭐     83🍴 Pipes) - Pipelines for expressive code on collections in C++. [MIT]
•    923⭐     80🍴 pprint) - Pretty Printer for Modern C++. [MIT]
•   1017⭐    164🍴 pspsdk) - An open-source SDK for PSP homebrew development. [BSD/GNU GPL3]
•     65⭐     12🍴 QtVerbalExpressions) - This Qt lib is based off of the C++ VerbalExpressions library. [MIT]
•    126⭐      8🍴 rain) - The fastest 128-bit and 256-bit non-crypto hash, passes all tests, and under 140 source lines of code. [Apache-2.0]
•    321⭐     50🍴 RapidFuzz) - Rapid fuzzy string matching in C++ using the Levenshtein Distance. [MIT] 🌎 website
•    630⭐     29🍴 rapidhash) - Very fast, high quality, platform-independent hashing algorithm. [BSD-2-Clause]
•    642⭐     81🍴 Reaction) - A lightweight, header-only reactive programming framework leveraging modern C++20 features for building efficient dataflow applications. [MIT]
• Remote Call Framework - Inter-process communication framework for C++. [GPL2/Proprietary]
•    594⭐     70🍴 reproc) - A cross-platform (C99/C++11) process library. [MIT]
•    583⭐     66🍴 SafetyHook) - C++23 procedure hooking library. [BSL-1.0]
•   1260⭐     56🍴 scnlib) - scanf for modern C++. [Apache-2.0] 🌎 website
• Scintilla - A free source code editing component. [MIT]
•   5256⭐    493🍴 SDS) - Simple Dynamic Strings library for C. [BSD]
•    193⭐     31🍴 semver.c) - A semver parser and render in ANSI C. [MIT]
• sigslot - C++ Signal/Slot Library. [PublicDomain]
•    969⭐     84🍴 SLJIT) - Platform independent low-level JIT compiler. [BSD] 🌎 website
•    832⭐    107🍴 palacaze/sigslot) - A simple, header only, C++14 signal-slots implementation [MIT]
•    129⭐     22🍴 simdzone) - Fast and standards compliant DNS zone parser. [BSD-3-Clause]
•    177⭐     43🍴 SimpleSignal) - High performance C++11 signals. [PublicDomain]
•    414⭐    182🍴 Stage) - Mobile robot simulator. [GPL2]
•  29782⭐   7881🍴 stb) ⚡ - A range of single-file libraries for C/C++. [PublicDomain]
•    972⭐     52🍴 stdman) - A tool that parses archived HTML files from 🌎 cppreference and generates groff-formatted manual pages for Unix-based systems. [MIT]
•   2658⭐     88🍴 StringZilla) - the Godzilla of string libraries, splitting, sorting, and shuffling large textual datasets faster than you can say "Tokyo Tower". [Apache-2.0]
• 🌎 StrTk - A C++ library consisting of high performance string processing routines. [MIT]
•     14⭐      1🍴 tgbotxx) - Telegram Bot C++ Library. [MIT]
•      ?⭐      ?🍴 tiny::optional) - Replacement for std::optional that does not waste memory unnecessarily. [BSL-1.0]
• 🌎 Tulip Indicators - A C library of over 100 financial technical analysis indicators. [LGPL]
•    184⭐     18🍴 ub-canaries) - A collection of C/C++ programs that try to get compilers to exploit undefined behavior.
•    406⭐     21🍴 value-category-cheatsheet) A PDF cheatsheet for lvalues, rvalues, and the like. [Jank copyleft]
•     16⭐      9🍴 VarTypes) - A feature-rich, object-oriented framework for managing variables in C++ / Qt4. [LGPL]
•      ?⭐      ?🍴 Wildcards) - A simple C++ header-only template library implementing matching using wildcards. [BSL-1.0]
•  10178⭐    850🍴 xxHash) - Extremely fast non-cryptographic hash algorithm. [BSD-2-Clause] 🌎 website
•    184⭐     40🍴 xxhash_cpp) - Port of the xxhash library to C++17. [BSD-2-Clause]
• ZBar - A barcode scanner library, which allows to scan photos/images/video streams for barcodes and return their value. [LGPL2]
•      ?⭐      ?🍴 ZXing) - An open-source, multi-format 1D/2D barcode image processing library implemented in Java, with ports to other languages. [Apache]

Software

Software for creating a development environment.

Compiler

List of C or C++ compilers

•   6302⭐    760🍴 8cc) - A Small C Compiler.
•   2141⭐    185🍴 c) - Compile and execute C "scripts" in one go! [MIT]
• Clang - A C compiler for LLVM. Supports C++11/14/1z C11. Developed by LLVM Team. [NCSA]
• 🌎 GCC - GNU Compiler Collection. Supports C++11/14/1z C11 and OpenMP. [GNU GPL3]
•    115⭐     32🍴 PCC) - A very old C compiler. Supports C99.
• 🌎 AMD C++ Compiler - Developed by AMD.
• 🌎 Intel C++ Compiler - Developed by Intel.
• LLVM - Collection of modular and reusable compiler and toolchain technologies.
• 🌎 Microsoft Visual C++ - MSVC, developed by Microsoft.
• Open WatCom - Watcom C, C++, and Fortran cross compilers and tools. [Sybase Open Watcom Public License]
• Oracle Solaris Studio - C, C++ and Fortran compiler for SPARC and x86. Supports C++11. Available on Linux and Solaris. [OTN Developer License]
• TCC - Tiny C Compiler. [LGPL]

Online Compiler

List of online C or C++ compilers

• 🌎 codechef - A simple online compiler CodeChef.
• coliru - Online compiler/shell with support for various C++ compilers.
• Compiler Explorer - An interactive compiler with assembly output available.
• CompileOnline - Compile and Execute C++ online on Linux.
• Ideone - An online compiler and debugging tool which allows you to compile source code and execute it online in more than 60 programming languages.
• 🌎 OneCompiler - An online compiler supporting over 70 programming languages and database systems.
• 🌎 Programiz - An online compiler for learners and developers.
• 🌎 repl.it - A powerful yet simple tools and platforms for educators, learners, and developers.
• Rextester - Online compiler which provides several compilers(Clang, GCC, MSVC) and several editors.
• 🌎 Try It Online - TIO is a family of online interpreters for an evergrowing list of practical and recreational programming languages.
• 🌎 Wandbox - An online Clang/GCC compiler with Boost available.
• 🌎 paiza.io - An online C/C++ compiler with multiple files supporting feature, GitHub(gist) integration and collaborative editing.
• 🌎 InterviewBit - A simple and easy to use online C++ compiler.

Debugger

List of C or C++ debuggers

• 🌎 Comparison of debuggers - A list of Debuggers from Wikipedia.
• 🌎 GDB - GNU Debugger.
• LLDB - The LLDB Debugger.
• 🌎 Metashell - An interactive template metaprogramming shell which includes the MDB metadebugger.
• Valgrind - A tool for memory debugging, memory leak detection, and profiling.
• x64dbg - An open-source x64/x32 debugger for windows.

Integrated Development Environment

List of C or C++ nominal IDEs.

• 🌎 Anjuta DevStudio - The GNOME IDE. [GPL3]
• AppCode - an IDE for Objective-C, C, C++, and JavaScript development built on JetBrains’ IntelliJ IDEA platform.
• 🌎 Cevelop - Cross-platform C and C++ IDE based on Eclipse CDT with additional plug-ins.
• CLion - Cross-platform C and C++ IDE from JetBrains.
• Code::Blocks - A free C, C++ and Fortran IDE.
• CodeLite - Another cross-platform, free C and C++ IDE. [GPL2 with an exception for plugins]
•    868⭐     53🍴 color_coded) - A vim plugin for libclang-based highlighting. [MIT]
• Dev-C++ - A portable C/C++/C++11 IDE.
• Eclipse CDT - A fully functional C and C++ IDE based on the Eclipse platform.
•   2780⭐    301🍴 Embarcadero Dev-CPP) - A fork of Dev-C++ that comes preinstalled with new themes and modern compilers. [GPLv2] 🌎 website
• Geany - Small, fast, cross-platform IDE. [GPL]
• IBM VisualAge - A family of computer integrated development environments from IBM.
•    913⭐     96🍴 Irony-mode) - A C/C++ minor mode for Emacs powered by libclang.
• 🌎 juCi++ - Cross-platform, lightweight C++ IDE with libclang integration. [MIT]
• 🌎 KDevelop - A free, open source IDE.
• 🌎 Microsoft Visual Studio - An IDE from Microsoft.
• 176214⭐  34667🍴 Microsoft Visual Studio Code) ⚡ - An open-source IDE from Microsoft. [MIT] 🌎 website
• 🌎 NetBeans - An IDE for developing primarily with Java, but also with other languages, in particular PHP, C/C++, and HTML5.
•   2855⭐    848🍴 Qt Creator) ⚡ - A cross-platform C++, JavaScript and QML IDE which is part of the SDK for Qt. [GPL3 with exceptions] 🌎 website
•   1834⭐    257🍴 rtags) - A c/c++ client/server indexer with for integration with emacs based on clang.
• 🌎 Xcode - Developed by Apple.
•  25896⭐   2785🍴 YouCompleteMe) - YouCompleteMe is a fast, as-you-type, fuzzy-search code completion engine for Vim.
•      ?⭐      ?🍴 cquery) - A C++ code completion engine for vscode, emacs, vim, etc.
• 🌎 C Playground - Online C Programming IDE - An online IDE to practice C Programming where you can write, edit, and run code online.

Build Systems

• 🌎 Bazel - A multi-language, fast and scalable build system from Google. [Apache]
•   5797⭐    336🍴 Bear) - A tool to generate compilation database for clang tooling. [GPLv3]
•   8558⭐   1146🍴 Buck) - A fast build system that encourages the creation of small, reusable modules over a variety of platforms and languages including C++ developed and used at Facebook. Written in Java. [Apache]
• 🌎 build2 - cross-platform build, packaging and dependency management toolchain for developing and packaging C/C++ projects. [MIT]
• 🌎 Ccache - A fast C/C++ compiler cache. [GPLv3]
•   5043⭐    255🍴 clib) - Package manager for the C programming language. [MIT]
• 🌎 CMake - Cross-platform free and open-source software for managing the build process of software using a compiler-independent method. [BSD]
•    459⭐     27🍴 Cget) - Cmake package retrieval. [Boost] website
• 🌎 Conan - C/C++ Package Manager, open sourced. [MIT]
•    748⭐     80🍴 CPM) - A C++ Package Manager based on CMake and Git.
• FASTBuild - High performance, open-source build system supporting highly scalable compilation, caching and network distribution.
• 🌎 Hunter - CMake driven cross-platform package manager for C++. [BSD-2]
• MesonBuild - An open source build system meant to be both extremely fast, and, even more importantly, as user friendly as possible.
• 🌎 Ninja - A small build system with a focus on speed.
•   6571⭐    594🍴 Sccache) - A fast compiler cache for C/C++, with cross-platform support and cloud backed storage options.
• Scons - A software construction tool configured with a Python script.
•     24⭐     10🍴 Sconsolidator) - Scons build system integration for Eclipse CDT.
• 🌎 Spack - A flexible package manager that supports multiple versions, configurations, platforms, and compilers. [Apache-2.0/MIT]
• 🌎 SW - Cross-platform C++ (and other langs) Build System and Package Manager with a lot of packages available. [GPLv3]
•    459⭐     77🍴 tundra) - High-performance code build system designed to give the best possible incremental build times even for very large software projects.
• tup - File-based build system that monitors in the background for changed files.
• Premake - A tool configured with a Lua script to generate project files for Visual Studio, GNU Make, Xcode, Code::Blocks, and more across Windows, Mac OS X, and Linux.
•  25492⭐   7034🍴 Vcpkg) - C++ library manager for Windows, Linux, and MacOS. [MIT]
• 🌎 waf - Python-based framework for configuring, compiling and installing applications. [BSD] 🌎 website
• 🌎 XMake - A C/C++ cross-platform build utility based on Lua. [Apache]

Static Code Analysis

List of tools for improving quality and reducing defects by code analysis

• Cppcheck - A tool for static C/C++ code analysis. -   6301⭐   1512🍴 source)
• 🌎 CppDepend - Simplifies managing a complex C/C++ code base by analyzing and visualizing code dependencies, by defining design rules, by doing impact analysis, and comparing different versions of the code.
•   1734⭐    294🍴 cpplint) - A C++ style checker following Google's C++ style guide.
• PVS-Studio - A tool for bug detection in the source code of programs, written in C, C++ and C#.
•    759⭐     87🍴 cpp-dependencies) - Tool to check C++ #include dependencies (dependency graphs created in .dot format). [Apache]
•   4473⭐    401🍴 include-what-you-use) - A tool for use with clang to analyze includes in C and C++ source files. 🌎 website
•  15364⭐   2047🍴 Infer) - A static analyzer for Java, C and Objective-C. [BSD]
• OCLint - A static source code analysis tool to improve quality and reduce defects for C, C++ and Objective-C. -   3837⭐    493🍴 source)
• Clang Static Analyzer - A source code analysis tool that finds bugs in C, C++, and Objective-C programs.
• Linticator - Eclipse CDT integration of Pc-/FlexeLint.
•   3028⭐    214🍴 IKOS) - Static analyzer for C/C++ based on the theory of Abstract Interpretation. [NOSA 1.3]
• 🌎 List of tools for static code analysis - A list of tools for static code analysis from Wikipedia.
•    143⭐     14🍴 OptView2) - Inspect missed Clang optimizations.
• 🌎 Trunk - Toolkit to check, test, merge, and monitor code.

Coding Style Tools

• Artistic Style - A tool to format C/C++/C#/Obj-C/Java code. Also known as astyle.
• ClangFormat - A tool to format C/C++/Obj-C code.
• Clang-Tidy - Clang-based C++ linter tool.
• 🌎 EditorConfig - EditorConfig helps maintain consistent coding styles across different editors and IDEs.
•   2958⭐    584🍴 Uncrustify) - Code beautifier.

Resources

Various resources, such as books, websites, and articles for improving your C++ development skills and knowledge.

API Design

• Beautiful Native Libraries
• 🌎 Designing Qt-Style C++ APIs

Articles

Fantastic C++ related articles.

•    319⭐     40🍴 CppCon 2023 Presentation Materials) - CppCon 2023 Presentation Materials.
•    547⭐     58🍴 CppCon 2022 Presentation Materials) - CppCon 2022 Presentation Materials.
•    110⭐     20🍴 CppCon 2021 Presentation Materials) - CppCon 2021 Presentation Materials.
•   1632⭐    211🍴 CppCon 2020 Presentation Materials) - CppCon 2020 Presentation Materials.
•   1256⭐    164🍴 CppCon 2019 Presentation Materials) - CppCon 2019 Presentation Materials.
•   1442⭐    179🍴 CppCon 2018 Presentation Materials) - CppCon 2018 Presentation Materials.
•   1816⭐    245🍴 CppCon 2017 Presentation Materials) - CppCon 2017 Presentation Materials.
•   1816⭐    247🍴 CppCon 2016 Presentation Materials) - CppCon 2016 Presentation Materials.
•   1794⭐    321🍴 CppCon 2015 Presentation Materials) - CppCon 2015 Presentation Materials.
•   2291⭐    395🍴 CppCon 2014 Presentation Materials) - CppCon 2014 Presentation Materials.
•     87⭐      6🍴 C++Now 2023 Presentations) - Presentation materials presented at C++Now 2023.
•      1⭐      0🍴 C++Now 2022 Presentations) - Presentation materials presented at C++Now 2022.
•      4⭐      2🍴 C++Now 2021 Presentations) - Presentation materials presented at C++Now 2021.
•     92⭐     16🍴 C++Now 2019 Presentations) - Presentation materials presented at C++Now 2019.
•    125⭐     28🍴 C++Now 2018 Presentations) - Presentation materials presented at C++Now 2018.
•    493⭐     69🍴 C++Now 2017 Presentations) - Presentation materials presented at C++Now 2017.
•     83⭐     14🍴 C++Now 2016 Presentations) - Presentation materials presented at C++Now 2016.
•    202⭐     20🍴 C++Now 2015 Presentations) - Presentation materials presented at C++Now 2015.
•    431⭐     72🍴 C++Now 2014 Presentations) - Presentation materials presented at C++Now 2014.
•    190⭐     14🍴 C++Now 2013 Presentations) - Presentation materials presented at C++Now 2013.
•    172⭐     24🍴 C++Now 2012 Presentations) - Presentation materials presented at C++Now 2012.

Books

Fantastic C or C++ related books.

• List of Free C or C++ Books
• 366744⭐  64005🍴 Free C Books) - vhf/free-programming-books/C.
• 366744⭐  64005🍴 Free C++ Books) - vhf/free-programming-books/C++.
•   8536⭐    902🍴 cppbestpractices) - Collaborative Collection of C++ Best Practices.

Coding Standards

• 🌎 Cert C++
• 🌎 Misra C++ 2008
• 🌎 Autosar C++ 2014

Coding Style

•  44139⭐   5505🍴 C++ Core Guidelines) - "Official" set of C++ guidelines, reviewed by the author of C++.
• C++ Dos and Don'ts - The Chromium Projects > For Developers > Coding Style > C++ Dos and Don'ts.
•  38469⭐  13002🍴 google-styleguide) - Style guides for Google-originated open-source projects.
• 🌎 Google C++ Style Guide
• GNU Coding Standard
• 🌎 Linux kernel coding style
• LLVM Coding Standards

Podcasts

• CppCast - The first podcast by C++ developers for C++ developers.
• CppChat - A (sometimes) weekly look at what's going on in the world of C++ chatting with a guest from the community.

Talks

•     11⭐      1🍴 C++ Conferences) - Catalog of C++ conferences
• 🌎 CppCon Talks ⚡ - The C++ conference.
•     87⭐     17🍴 Quick game development with C++11/C++14) - CppCon 2014 talk by Vittorio Romeo.
•     10⭐      0🍴 Presentation on Hana for C++Now 2015)
• 🌎 Meeting Cpp - Meeting C++ YouTube Channel

Videos

Fantastic C or C++ related videos.

• List of C or C++ YouTube Videos
• Awesome C Programming Tutorials in Hi Def [HD] - A collection of detailed C Programming Language Tutorials for Beginners and New Programmers.
• 🌎 C++ - by VoidRealms.
• 🌎 C++ Qt Programming - by VoidRealms.
• 🌎 C++ Programming Tutorials Playlist - TheNewBoston Official Buckys C++ Programming Tutorials Playlist.
• 🌎 C++ Programming Tutorials from thenewboston - These are all of thenewboston's C++ programming tutorials.
• 🌎 C++ GUI with Qt Playlist - Official Playlist for thenewboston C++ GUI with Qt tutorials.
• 🌎 Caleb Curry's C Programming Tutorials - An all-in-one playlist of tutorials for C programming.
• 🌎 C Programming Tutorials - All of TheNewBoston's C programming tutorials are right here.
• 🌎 Bo Qian's playlist - Boost Library, C++ Standard Library, Modern C++, Advanced C++, Advanced STL, ...
• 🌎 The Cherno's C++ Playlist - Extensive C++ tutorial series by The Cherno.
• 🌎 Code for Yourself C++ Playlist - A complete C++ course covering everything from fundamentals to software design.

Websites

Useful C or C++ related websites.

• 🌎 Standard C++ ⚡ - News, Status & Discussion about Standard C++.
• 🌎 Build Bench - Compare C++ Builds.
• 🌎 Quick Bench - Quick C++ Benchmarks.
• CppCon - The C++ Conference.
• 🌎 C++ reference - A complete online reference for the C and C++ languages and standard libraries.
• C++ by Example - Learn C++ by Example.
• cplusplus.com - The C++ Resources Network.
• C FAQ - C frequently asked questions.
• C++ FAQ - C++ frequently asked questions.
• C++ FQA Lite - C++ frequently questioned answers.
• 🌎 C++ Quiz - A simple online quiz that you can use to test your knowledge of the C++ programming language.
• Guru of the Week - A regular series of C++ programming problems created and written by Herb Sutter.
• Meeting C++
• 🌎 PVS-Studio’s challenge - PVS-Studio’s C++ quiz in which you're asked to find errors in code fragments of open source projects.
• 🌎 Udemy C++ Courses and Tutorials
• C++ Hints - Every business day hints about most often C++ mistakes and ways to solve them from PVS-Studio Team.
• 🌎 C++ tutorial - A user ranked online tutorial bank site displaying multiple courses to learn C++ from.
• 🌎 C++ Tutorial for Beginners - A comprenhensive tutorial on C++ curated by trained experts.
• 🌎 cppexpert.online - Learn the best C++ practices by improving code snippets with some problems or with bad practices.
• C++ for yourself - A comprehensive tutorial on modern C++ covering everything from fundamentals to software design.

Weblogs

Useful C or C++ related weblogs.

• 🌎 Coding For Speed - Coding For Speed DOT COM, Less Execution Time.
• Eric Niebler
• 🌎 Sticky Bits
• Paul Fultz II's Blog
• ridiculousfish - Will It Optimize?
• Embedded in Academia
• 🌎 Simplify C++
• 🌎 Fluent C++
• 🌎 Bartek's Coding Blog
• 🌎 Kenny Kerr
• 🌎 Sutter’s Mill
• 🌎 Vorbrodt's C++ Blog
• 🌎 foonathan::blog()
• 🌎 C++ Team Blog - Dev blog from the Microsoft Visual C++ team

Other Awesome Projects

Collection of useful codes, snippets, ...

•   5400⭐   1530🍴 algorithms) - Algorithms & Data Structures in C++.
•   3508⭐    740🍴 c-algorithms) - C algorithms library.
•   1473⭐    609🍴 30 Seconds of C++)

Other Awesome Lists

Other amazingly awesome lists

•  10564⭐    723🍴 lists) - List of (awesome) lists curated on GitHub.
•  32829⭐   3583🍴 awesome-awesomeness) - A curated list of awesome awesomeness.
• 395943⭐  31382🍴 awesome) ⚡ - A curated list of awesome lists.
•   5068⭐    516🍴 C++ links) - A categorized list of C++ resources.
• 🌎 Awesome C++ - LibHunt's mirror.
• 🌎 Awesome C 1
•   3687⭐    354🍴 Awesome C) 2
•  12542⭐   1200🍴 Awesome Modern C++) - A collection of resources on modern C++.
•   2468⭐    259🍴 AwesomePerfCpp) - A curated list of awesome C/C++ performance optimization resources.
• 366744⭐  64005🍴 free-programming-books) - List of Freely Available Programming Books.
• Inqlude - The Qt library archive.
•  97642⭐   6065🍴 papers-we-love) - Papers from the computer science community to read and discuss.
•  23523⭐   2869🍴 awesome-algorithms) - A curated list of awesome places to learn and/or practice algorithms.
•   3921⭐    253🍴 awesome-hpp) - A curated list of awesome header-only C++ libraries.
•   6177⭐    418🍴 awesome-talks) - A lot of screencasts, recordings of user group gatherings and conference talks.
•  46797⭐  10681🍴 Projects) - A list of practical projects that anyone can solve in any programming language.
•  76785⭐   9153🍴 Awesome interview questions) - A list of lists of interview questions for the most popular technologies, including C and C++.
•   9506⭐    630🍴 nothings/single_file_libs) ⚡ - List of single-file C/C++ libraries.

Jobs

• This list is currently empty, but you can add to it by opening a merge request.

Sponsors

• Please reach out if you are interested in sponsoring this repo. Your company's name and logo will be prominently displayed here.

Contributing

Please take a quick gander at the contribution guidelines for details. Thanks to all contributors; you rock!

If you see a project or link here that is no longer maintained or is not a good fit, please submit a pull request to improve this document. Thank you!

Source

 65979⭐   8088🍴 fffaraz/awesome-cpp)