Just discover since 2 days this crazy thing!
http://processing.org/exhibition/ Open Source all computers
Of course you must write some lines but...all is not very complicated :)
And if you want not write you can reload some codes as the spirit of this prog is to give source with performance
http://builtwithprocessing.org/ thousand of examples!

Graphically totally amazing : Mixing drawings, text, sounds, video, interaction!

Like this guy Jared Tarbell http://www.complexification.net/ scroll programs interactive inside