Design patterns implemented in Java

Free and Open Source, Distributed, RESTful Search Engine

Everything you need to know to get the job.

Ghidra is a software reverse engineering (SRE) framework

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

IntelliJ IDEA Community Edition & IntelliJ Platform

Logstash - transport and process your logs, events, or other data

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

The ZAP by Checkmarx Core project

Cracking the Coding Interview 6th Ed. Solutions

Generate diagrams from textual description

Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process …

Continuous Inspection

Some Android learning materials, hoping to help you learn Android development.

Distributed scheduled job

OWASP dependency-check is a software composition analysis utility that detects publicly disclosed vulnerabilities in application dependencies.

Apache Pinot - A realtime distributed OLAP datastore

JanusGraph: an open-source, distributed graph database

Apache Kafka® running on Kubernetes

Password manager app for Android

Open source Old School RuneScape client

A bridge/proxy allowing you to connect to Minecraft: Java Edition servers with Minecraft: Bedrock Edition.

Generates a unified GraphQL schema from gRPC microservices and other Protobuf sources

The Data Transfer Project makes it easy for platforms to build interoperable user data portability features. We are establishing a common framework, including data models and protocols, to enable d…

SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.

Dependency-Track is an intelligent Component Analysis platform that allows organizations to identify and reduce risk in the software supply chain.

Rest.li is a REST+JSON framework for building robust, scalable service architectures using dynamic discovery and simple asynchronous APIs.

A plugin that allows branch analysis and pull request decoration in the Community version of Sonarqube

The SpotBugs plugin for security audits of Java web applications and Android applications. (Also work with Kotlin, Groovy and Scala projects)