Tracked Music Editor
Featureful native Commodore 64 music tracker with MIDI/XM converter
Free music notation & composition software
ScoreDate is a software to learn music reading and ear training
Buzztrax is a modular music composer for Linux
at new home :-) https://github.com/supermurat/hamsi-manager
Transpose melodies for diatonic harmonica
A tool for automated downmixing of live multitrack sound recordings
Give the chord progression and a style and jchordbox generates a song.
Open-Source Braille Music Notation Software