A free Windows-compatible Operating System

Learning operating system development using Linux kernel and Raspberry Pi

A completely-from-scratch hobby operating system: bootloader, kernel, drivers, C library, and userspace including a composited graphical UI, dynamic linker, syntax-highlighting text editor, network stack, etc.

A BSD-based OS project that aims to provide an experience like and some compatibility with macOS (formerly known as airyxOS)

Rust version of THU uCore OS. Linux compatible.

A proof-of-concept microkernel that implements a WebAssembly "usermode" that runs in Ring 0.

A Go unikernel running on x86 bare metal

A kernel designed to run one and only one application in a virtualized environment

🥑 The delightful operating system.

Unikraft is an automated system for building specialized OSes known as unikernels. Unikraft can be configured to be POSIX-compliant. (Core repository)

Hermit for Rust.

A list of operating systems and stuff

The Lemon Operating System

Rust wrapper for UEFI.

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

A Rust-based, lightweight unikernel.

Unix-like OS in Rust inspired by xv6-riscv

A Simple Unix-like operating system

A simple heap memory allocator in ~200 lines.

a little 64bit operating system written in c++ with smp support