In honor of Robert Moog's 78th Birthday today (May 23rd) there is an interactive Google Doodle that allows you to not only play a synthesizer, but record and share your tune! Be sure to check out http://www.google.com/doodles/ for all of Google's past doodles!
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It was fun to play with. :+)
Moog has a great app for the iPhone and iPad that provides a fully-functional Moog synth. Was staring at it for an hour last night. THink I'll have to buy it. The iPad version is the better of the two, of course, and both are on sale until the 28th. http://www.moogmusic.com/products/apps/animoog-999-until-5292012