Open Software from Closed Countries
If Windows 7, Mac OS X, or Ubuntu Linux aren't doing it for you, maybe try out a state-sponsored operating system from your favorite dictatorship: North Korea's Red Star or Cuba's Nova. Both appear to be Linux variants.
Engadget reports that the North Korean distro looks a lot like Windows, with just a few minor differences: the equivalent of the "Start" button has been replaced with a red star, and Firefox is called "My Country." Oh, and: it doesn't connect to the internet...just the local, gov't-approved BBS.