osdev

reactos

+63

A free Windows-compatible Operating System

ravynos

+15

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

kernel

+5

A Rust-based, lightweight unikernel.

nanovms/nanos

+5

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

unikraft

+4

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

uefi-rs

+3

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.

hermit-rs

+2

Hermit for Rust.

awesome-os

+1

A list of operating systems and stuff

Osdev-Notes

+1

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