Bandlab - Capture, nurture, and collaborate on song ideas in the cloud
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Amper Music - Artificial intelligence music composer
Guitar Pro 7 - Create, play and share your tabs
Music Memos by Apple - An app to capture your song ideas
MMA - “MMA—Musical MIDI Accompaniment” is an accompaniment generator.