5. Edgy Eft (6.10)
Flickr image credit: Dave Bonta
What's an eft? Glad you asked. It's essentially a newt in its terrestrial juvenile phase--the teenager of newts, if you will. Bright colors in these lizard-like creatures often warn of toxins secreted by their skin.
Edgy Eft, on the other hand, was the fifth Ubuntu release, launched in October 2006. It featured automated crash reports and the F-Spot photo manager.