There are 2 repositories under computer-assisted-composition topic.
"Dicy2 for Max" is a Max package implementing interactive agents using machine-learning to generate musical sequences that can be integrated into musical situations ranging from the production of structured material within a compositional process to the design of autonomous agents for improvised interaction. Check also our plugin for Ableton live !
A web application for generating polyphonic music improvisations as MIDI files.
jinx: an interactive learning toolkit for tuning theory
A MaxMSP-based tool for Computer Assisted Composition
simple midi file writer in Lua
simple set class calculator written in Lua