Music software that runs on Linux
This list of software with which you can create music on Linux, not play or process it.
- Canorus, musical score editor (not maintained last I checked)
 - Gtick, metronome
 - Hydrogen, drum machine/step sequencer
 - LMMS, Linux Multimedia System, music production
 - Milkytracker, "tracked" music editor
 - Musescore, musical score editor
 - Tuxguitar, multitrack guitar tablature editor and player