In the old days the BeOS was another competitor to linux, and unix, but has since died until now. Some of the former code has been used to make Haiku. It is not linux and not unix, it's somewhere in between. I'm not sure what kernel the new release uses, definitely not linux. The new Haiku release is tailored to be a simple desktop OS, not with fancy features. With these economy specs, Haiku could be an alternative to some of those nano versions of linux and unix. Official site: http://www.haiku-os.org/ Youtube demo: If you guys ever install, tell us what's it like, or post any general comments.