abcmidi is a library of programs to handle abc music notation files
Cakewalk to Standard MIDI Files Command Line Utility Translator
My adventures with MIDI on 8- and 16-bit computers
Dump psg/ym chip tune files to txt and midi format
Versatile algorithmic random music generation software written in Java
Featureful native Commodore 64 music tracker with MIDI/XM converter
ScoreDate is a software to learn music reading and ear training
Text-based Music Programming Tools
Package to use RockBand 3 Pro Drumkit and Guitar Hero drumkit via midi
Convert Ensoniq .ECW files to .SFZ
Extract text or SysEx from a standard MIDI file
Check a standard MIDI file for errors
Convert between SMF (Standard MIDI File) and RMID (RIFF MIDI) format
Edit the INFO list chunk in a RIFF file
A port of Piet van Oostrum’s MIDI file manipulation utilities
Control Jack transport features using MIDI commands.
Midi-file player using Jack-Midi and synchronises to Jack-Transport
Give the chord progression and a style and jchordbox generates a song.
MIDI multi track song writing in an ASCII editor!
Very Powerfull Crossplatform Qt Based Music Note Editor[Still Planing]
make connections and start JACK server from command-line