Your Ass Os is an Operation system kernel. Whole written in C and assembly, need supporters.
Horizon is a research project aimed at developing a 32-bit Operating System for the Intel architecture. It's written in C and assembler (GAS syntax) and one of its main characteristics is full network integration.
lysis is working on a features rich home automation system that ranges from CAN-bus, 1-wire and RF up to a HTPC; both hardware and software are addressed to make the really smart home; the domotics will provide energy saving, comfort, flexibility, safety
Simple 32/64bit mode OS. Paging, handling exceptions IRQ INT, Basic: PIC/APIC, PCI, kbd, ps/2 mouse, ata. Thanks to wiki.osdev.org and (in alphabetical order): Kicer86, milyges, Nevar, webczat, Wojtulas. (IRC freenode #osdev.pl)
This project is an SO with a bootloader, a kernel, and posiblely modules
The open bicycle computer (oBiCo) is an outdoor computer to be mounted on your bike. We are providing an open source based plattform to ether use Linux based software or go with a small GPL'ed C++ OS (Booting in just 2 seconds)
Open Source Object Oriented Operating System for Intel 32-bit architecture.
A multi-tasking, multi-threaded micro-kernel operating system for the x86 platform.
tOfuS is an OS kernel with framework capabilities, in order for everyone to experiment on it. (was: A Music-Production oriented Operating System, for use in recording studios and live performances as a mixing desk and user-programmable DSP).
yaMOS stands for: yet another "My Operating System". This is a hobby Operating System, let's see to what it develops... At the moment it's only a kernel written in C++ and Assemly.