A free Windows-compatible Operating System

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• Updated Nov 11, 2026
• C

Learning operating system development using Linux kernel and Raspberry Pi

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• Updated Mar 29, 2024
• C

An open-source OS project that aims to provide source and binary compatibility with macOS® and a similar user experience.

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• Updated Sep 6, 2026
• C

Complete, independent operating system built by humans.

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• Updated Nov 9, 2026

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

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• Updated Nov 5, 2026
• C

Rust version of THU uCore OS. Linux compatible.

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• Updated Aug 24, 2023
• Rust

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

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• Updated Nov 8, 2026
• C

🥑 A modern delightful operating system (mirror)

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• Updated Jul 8, 2026
• C++

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

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• Updated Feb 28, 2023
• Rust

A Go unikernel running on x86 bare metal

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• Updated Jul 22, 2023
• Go

A list of operating systems and stuff

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• Updated Nov 11, 2026

Hermit for Rust.

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• Updated Nov 10, 2026
• Rust

Unix-like OS in Rust inspired by xv6-riscv

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• Updated Sep 27, 2026
• Rust

Rusty wrapper for the Unified Extensible Firmware Interface (UEFI). This crate makes it easy to develop Rust software that leverages safe, convenient, and performant abstractions for UEFI functionality.

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• Updated Nov 9, 2026
• Rust

A Rust-based, lightweight unikernel.

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• Updated Nov 10, 2026
• Rust

The Lemon Operating System

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• Updated Nov 23, 2024
• C++

Genode OS Framework (migrated to https://codeberg.org/genodelabs/genode)

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• Updated May 20, 2026
• C++

A book that explore how to write an Operating System from scratch

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• Updated Nov 6, 2026
• Markdown

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

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• Updated Aug 26, 2026
• C

MOROS: Obscure Rust Operating System 🦉

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• Updated Oct 19, 2026
• Rust