AIVA - The AI composing emotional soundtrack music
Hum - Songwriting for iPhone
Abundant Music - Generate royalty free music with a simple but very powerful procedural music creator
Tape It - App for songwriting & audio recording.
WaveBots Editor - Procedural music and sound maker that exports to Wav, MIDI, GoatTracker and much more.
Songcraft.io - A platform for songwriters to write, organize & collaborate.