AthTek DigiBand - AthTek DigiBand is a piece of automatic music composition software for Windows.
Abundant Music - Generate royalty free music with a simple but very powerful procedural music creator
Automated Composing System - ACS creates automated arrangements so you can compose music without musical knowledge.
AIVA - The AI composing emotional soundtrack music
TrebleMaker - Procedurally generated, royalty-free MIDI compositions
WolframTones - Listen to what I just found in the WolframTones music universe