The Ether Synth is a Kinect based OSC controller complete with an accompanying synthesizer. The current version was the grand prize winner of the first ever HackIt Fresno competition. It was made in under 24 hours and the code is still a bit hacky. Eventually the Ether Synth will feature a multi-user mode and more configuration options.
The Ether Synth was made using openFrameworks and Pure Data. The souce code can be found on GitHub.