Abundant Music - Generate royalty free music with a simple but very powerful procedural music creator
Helio Workstation - Cross-platform lightweight speed-painting tool for creating music.
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