I was bored...

An os distribution and a kernel aiming for NT compatibility

A NUX-based Mach clone.

Jeff BezOS: the operating system

A hobby operating system kernel targeting x86_64.

A minimal and expandable Unix-like kernel

OSDev Experiments In Zig

Various tools for using AmigaOS programs on other platforms

incomplete implementation of AmigaOS's exec.library

Will's UNIX

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

Real-time multiprocessor microkernel

xMach (Mach4+Lites) cloned from Sourceforge CVS

x86-64 Operating System

Small hobbyist operating system

A modern operating system for Amiga computers.

A portable, ROM-booting hobby OS. Currently supports m68k, arm, and PowerPC targets

A hobby OS supporting the x86_64, aarch64, and riscv64 architectures. Loongarch64 support planned

Automatic conversion of the NetBSD src CVS module, use with care. Please submit bugs/changes via https://gnats.netbsd.org

Experimental microkernel i386 OS

Ananas Operating System

Simple UNIX clone

K42 Kernel

My Operating System

Multithreaded usermode virtual memory manager state machine

A portable and easy-to-integrate implementation of the Advanced Configuration and Power Interface (ACPI)

Hobbyist ARM64 operating system /w microkernel design. Includes a kernel written in C and user land apps in C++.