A single-user single-task ROM-based OS for my 8-bit homebrew computer
A cute and educational x86 OS
NES/Famicom emulator based on FCE Ultra.
OS-9/6809 compatible operating system for Tandy CoCo and Dragon
an MS-DOS compatible OS, written in Pascal and i8086 assembly
An open source filesystem library
Simplest kernel for cooperative multithreading
OS bootable from Linux,Windows and others partitions as auxiliary OS
Real time preemptive embedded multi-thread kernel
Ubuntu-based Linux Gaming OS
A Debug style tool for OS Free systems
A UNIX-like kernel for the i386 architecture
Mulithreading Arduno library
FreeMiNT is a free alternative OS kernel for Atari systems & clones
Written in pure ASM and Exode with cloud computing in mind.
This will be an operating system
An indie, hobby operating system
AO RTOS is small real time OS based on Active Object concurrency model