Really mini operating system (extracted from xen-unstable, and much stuff removed)
OTHER License
Projects for an undergraduate OS course
A developing operating system
xv6 OS
Acess2 Hobby Operating System
x86 PC emulator that runs both natively and in the browser, via WebAssembly
Yet another simple kernel
FlashDB BSP for auto test
BusyBox mirror
mirror of the source code of the Xv6 operating system
A hobby OS with a custom kernel and userspace, with many ported software including musl libc, SDL...
A tiny C header-only risc-v emulator.
Nintento Entertainment Kernel: Nintendo emulator
Modular and configurable OS for embedded applications
A VM That is Dynamic and Fast
My very own UNIX clone, for education/self-amusement.