Amazon Machine Learning - Machine learning made easy for developers of any skill level
Flowkey - The easiest way to learn piano with your iPhone or iPad
Lobe - Visual tool for building custom deep learning models
Yousician - Learn to play music at home, at your own pace
Apple Machine Learning Journal - A blog written by Apple engineers
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.