The FastLED library for colored LED animation on Arduino
An open source VR headset with SteamVR supports for $200
Handy LPT port pins manager (also support COM port via USB)
Play any MIDI song on floppy drives !
A complete Arduino library for the Fluxamasynth shield.
Serial video switch controller based on Arduino Uno
3 port MIDI merger based on Arduino Mega
A motion-control-system for timelapse & video photography
Perl script / Arduino sketch for converting MIDI to C