Automatically pause your music, set individual apps' volumes, etc.
Icecast and Shoutcast broadcasting client
Multi-Format Audio-Encoder Front-end
MIDI monitor for Linux
Convert a MIDI file to a LilyPond file
A viewer for a new kind of music notation
Software portion of a hybrid hardware/software MIDI foot controller.
Your Hardcore Loop Machine for Windows, Linux and OS X.
A GPL software synthesizer for all.