!unixporn
Submit screenshots of all your *NIX desktops, themes, and nifty configurations, or submit anything else that will make themers happy. Maybe a server running on an Amiga, or a Thinkpad signed by Bjarne Stroustrup? Show the world how pretty your computer can be!
As ducky said. As for where to get it, it came with Ubuntu Studio by default, so I'm not sure beyond that