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 source and binary compatibility with macOS® and a similar user experience.

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

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

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

A Simple Unix-like operating system

A simple heap memory allocator in ~200 lines.

An unix-like toy kernel

Writing & Making Operating System and Kernel parts so simple like Hello World Programs, Starting from writing Bootloaders, Hello World Kernel, GDT, IDT, Terminal, Keyboard/Mouse, Memory Manager, HDD ATA R/W, VGA/VESA Graphics

opuntiaOS - an operating system targeting x86, ARM and RISC-V.

Polar D8 kernel.

AquilaOS: UNIX-like Operating System

A x86 32bit Hobby Operatingsystem with graphics, multitasking, networking and 32bit C-Compiler for i386 architecture.

A hobby operating system developed from scratch

A WIP 64-bit UNIX-like kernel

An operating system written in C

"It is very special"

💾 Amd64 operating system in C. Trying to make a full OS, with a simple and readable codebase!