syzkaller is an unsupervised coverage-guided kernel fuzzer
A BSD-based OS project that aims to provide an experience with MacOS
The operating system and all related software
A python Linux Kernel Simulator
Vampire OS is the alternative to Windows and macOS
A microkernel-based multiserver operating system written from scratch.
C-BIOS is an open source BIOS for MSX computers.
Auto-Case converts your mistake into perfection!
Written in pure ASM and Exode with cloud computing in mind.
A Haskell kernel for the Jupyter project