A next-generation cloud native kernel designed to unlock best-in-class performance, security primitives and efficiency savings.

🏢 An operating system inspired by brutalist design that combines the ideals of UNIX from the 1970s with modern technology and engineering

🥑 A modern delightful operating system

KISS Linux - Init Framework

The Xous microkernel

Darwin is the Open Source core of macOS, and PureDarwin is a community project to extend Darwin into a complete, usable operating system.

Symbian OS Kernel

Vinix is an effort to write a modern, fast, and useful operating system in the V programming language

A BSD-based OS project that aims to provide source and binary compatibility with macOS® and a similar user experience.

A bootloader and experimentation playground for Apple Silicon

An operating system written in Common Lisp

a small statically-linked linux system

Writing an OS in Rust

An operating function

CP/M for the 6502

Hermit for Rust.

Chromebook Developer Tool

An operating system designed for hosting containers

Everything needed to build DivestOS, a more private and more secure aftermarket mobile operating system.

The Open SIMH simulators package

tiniest x86-64-linux emulator

'Classic' FreeRTOS distribution. Started as Git clone of FreeRTOS SourceForge SVN repo. Submodules the kernel.

Drop-in pure-Python replacement for common shell utilities

A TempleOS distro for heretics

Deno Window Manager: Cross-platform window creation and management

A seamless blend of all Linux distributions.

Use any linux distribution inside your terminal. Enable both backward and forward compatibility with software and freedom to use whatever distribution you’re more comfortable with. Mirror available…

Virtual Machine for the Web

The Haiku operating system. (Pull requests will be ignored; patches may be sent to https://review.haiku-os.org).

Envision a future where every student can read all the code of a teaching operating system.