Universal server
Building and running ancient Linux on Windows
AO RTOS is small real time OS based on Active Object concurrency model
Alternative operating system for x86 computers
RTOS for Secure, Safe and Real-Time Systems
Real-Time Embedded Operating System
Ping-Pong-like game in Assembly that works without OS
Helps you to Boot your Experimental Assembly Language programs
A UNIX-like kernel for the i386 architecture
Mulithreading Arduno library
A small operating system, compatible with MS-DOS, written in assemly
Embedded Real-Time Operating System (RTOS)
A low-power ISA design and simulator for a 2010 IEEE competition
Operating System in 512bytes.
A small microcontroller LED Pin-back button for just 1 $