Hyperion is an opensource 'AmbiLight' implementation controlled using the RaspBerry Pi running Raspbmc.
D::Light is a software designed for theater lighting. It currently both works on OS X and windows XP, and also on Linux 32 & 64 bits
the Drum Buddy is a 4 oscillator, light activated, mechanically rotating drum machine and the invention of renowned New Orleans musician, Quintron
Eden Project is made of 6,000 acrylic stems, through which fibre optic cables run, each crowned with a clear glass sphere