AIVA - The AI composing emotional soundtrack music
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
WolframTones - Listen to what I just found in the WolframTones music universe
Guitar Pro 7 - Create, play and share your tabs
WaveBots Editor - Procedural music and sound maker that exports to Wav, MIDI, GoatTracker and much more.
MMA - “MMA—Musical MIDI Accompaniment” is an accompaniment generator.