Qtzweb: A Quartz Composer to WebGL & JavaScript Compiler
CoGe is a free, open-source, semi-modular Quartz Composer powered VJ Application for Mac OSX with a solid, minimalistic look and feel. It's an unconventional application, because has not built-in media handle feauters or effects. With the excellent Quartz Composer support, you can build your own media handlers, effects, mixer and automatization modules.
Synapse is an app for Mac and Windows that allows you to easily use your Kinect to control Ableton Live, Quartz Composer, Max/MSP/Jitter, and any other application that can receive OSC events. It sends joint positions and hit events via OSC, and also sends the depth image into Quartz Composer. In a way, this allows you to use your whole body as an instrument.