Neptune is a kernel and operating system for x86 PCs.
Embedded Operating System
A small operating system, compatible with MS-DOS, written in assemly
Embedded Real-Time Operating System (RTOS)
Independent GNU/Linux distribution
Project has been move to https://github.com/ciaa/Firmware
LinuxID is an easy console-service for distro identification and more!
Personnalise le shell linux
operating system for Intel 8086 / 8088
Raspberry Pi SD Image with Ruby and SiriProxy
An operating system written in C & assembly.
Python2.7.3 for android
Operating System in 512bytes.
FreeBSD utility to manage Boot Environments on ZFS filesystems
Overnet Millennium Server for Unix Linux
Tarbox OS is a minimalistic 16 bit OS being developed in x86 Assembly.