Rock Me Amadeus
Rock Me Amadeus is an open source multi-touch mp3 player. You can get a jump start by importing your iTunes music catalog. Rock Me Amadeus is built using the Adobe Air runtime.
Proof of Concept Video
Here is a video of how the application is working at current:
I like to stress the proof of concept because I know it's kind of broken and busted in this video. (In particular, the music visualization is off)
OpenFlux
Rock Me Amadeus uses OpenFlux and PlexiGlass to create a flexible 3d visualization of your music catalog.
Screen Shots
TUIO Protocol
The open source TUIO protocol is used to translate multi-touch events into Flash touch events. Multiple touches can be used to provide an interactive music equalizers and other music visualizations.
Musical Visualization
Screen shot taken using SimTouch TUIO simulator.