Universal Binary (Freeware)
Requires Mac OS X 10.4.11 or higher
FluidTunes gives you control over your music using only a camera, and your hands, head or feet.
Swipe your hand from left to right or right to left over the screen center to scrub. Wave quickly at buttons to activate them.
Without using a keyboard or mouse, you can navigate through your music and play or pause songs.
If you like FluidTunes, you might also like iSight Screensavers