The Futurama Alien Alphabet appears in Matt Groening's animated series Futurama. It is used mainly to write signs which appear in the background of some scenes and which are often in-jokes.
Free Futurama fonts
Much Ado About Futurama - a fan site wth lots of information about Futurama (includes free font): http://www.killbots.com
Another alphabet used in Futurama