Abundant Music - Generate royalty free music with a simple but very powerful procedural music creator
Captain Chords - Write chord progressions in your favorite DAW
AIVA - The AI composing emotional soundtrack music
RapidComposer - MusicDevelopments RapidComposer: Music Prototyping and Automated Composition Software
WolframTones - Listen to what I just found in the WolframTones music universe
Cthulhu - VST MIDI-FX plugin for harmonic inspiration