EasyABC is an open source ABC editor
music composition and notation software, audio to midi converter
Leadsheet notation with auto-generated playback, improvisation advice
Music score editor
A viewer for a new kind of music notation
Free open source DAW, MIDI sequencer, software synthesizers
Synthesizer, mixing, sound effects, music composition and production.
Native note editor for the MEI encoding format
An Interactive Music Learning App
Resources for LilyPond and LaTeX users writing (about) music
(LaTeX package to) Manage music examples in LaTeX documents
MIDI multi track song writing in an ASCII editor!
Open-Source Braille Music Notation Software