3. Breezy Badger (5.10)
Flickr image credit: Daniel Hughes
Part of the weasel family, badgers are short-legged omnivores with a powerful jaw that can grab prey with a virtually unbreakable grip. Found all over the world, badgers live in underground burrows and can be fierce opponents. They've also been known to hunt cooperatively with coyotes.
The Breezy Badger Ubuntu release of October 2005, on the other hand, added a graphical bootloader, an Add/Remove Applications tool, a menu editor, and Launchpad integration.