An open-source alternative to Apple Mac OS X. Intended to comply completely with the OPENSTEP specification. Written in Objective-C. Kernel based on FreeBSD.
Labyrinth BSD is a stable BSD implementation intended for the average user.
Tophat is a modification of a N64 and NES hardware to act like a Laptop. Tophat will make use of modified versions of Linux, BSD and the open source versions of MacOSX
Object Oriented Operating System
OOOS stands for Object Oriented Operating System. It's an x86 kernel written in VC++ using domain embedded language techniques. It is not a functional kernel, it's a demonstration of various techniques to use template meta-programming techniques in low-level applications.