An anonymous reader writes "LoseThos is an Opperating System written by one man, and designed as the ultimate operating system for your home and work needs. After working on it for ever 7 years, the author is finally releasing it to us, the common computer user. A GPL compliant free, open source OS allows you to add features if you like, legally! Not that you'd need to, with features like Just-in-time compiling (No need for object or exe files), Support for FAT32, and a full physics engine, you shouldn't need much more.
A youtube demo of the OS is available here http://www.youtube.com/watch?v=WAr-xYtBFbY"Link to Original Source