MoonOS (just a kernel atm) is a micro kernel designed for the x86_64 and arm architecure.

A modern x86_64 UNIX-like microkernel-based operating system

Radical kernel source tree

An x86 Operating System written in C++ and C

A hobbyist 64-bit OS

Arikoto is a personal OS project that is inspired by and is aiming to have a similar nature to ToaruOS.

C OS template

A Simple OS for literally everything.

A Stable, Modern and Fast x86-64 Operating System.

Freestading 64-bit kernel (currently in very early development stage))

Kernel of the Lyre operating system

A hobby OS supporting the x86_64, aarch64, and riscv64 architectures. Loongarch64 support planned

Monolithic kernel-based OS targeting x86_64

Limine and xmake help you to start your x86_64 UEFI kernel life.

AxeniaOS is a simple graphical OS written in C by me.

A hobby x86-64 OS made to make me lose my sanity (;

a unix-like operating system which uses limine and the stivale2 boot protocol.

AlephOS is a simple operating system written in C with Limine.

KronosOS - a hobby operating system.

an x86-64 kernel