Bandlab - Capture, nurture, and collaborate on song ideas in the cloud
Abundant Music - Generate royalty free music with a simple but very powerful procedural music creator
Amper Music - Artificial intelligence music composer
AIVA - The AI composing emotional soundtrack music
Storybeat - Storybeat app comes up with features to help you in changing the background music of your videos in a few simple steps to share your favorite moments with your social media friends.
WolframTones - Listen to what I just found in the WolframTones music universe