La Touche Musicale allows you to learn the songs you love on piano. Connect your MIDI keyboard to your device and learn very quickly.
Flowkey - The easiest way to learn piano with your iPhone or iPad
Simply Piano - Fast and fun way to learn piano
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.
Synthesia - A fun way to learn how to play the piano.
Yousician - Learn to play music at home, at your own pace
Skoove - Babbel for learning the piano