A Fasttracker II compatible music editor
ossia score, an interactive sequencer for the intermedia arts
Free music notation & composition software
Runabc is a user interface supporting abc music notation software
A free piano-learning application that turns MIDI files into lessons
Featureful native Commodore 64 music tracker with MIDI/XM converter
mk1utils: tools for the Wersi MK1, EX20, DX10, EX10R, DX5
Networked music collaboration
Text-based Music Programming Tools
Give the chord progression and a style and jchordbox generates a song.