Waves GTR - From Fender® to Marshall®, Mesa/Boogie® to Vox®, and more, Waves has captured...
Yousician - Learn to play music at home, at your own pace
ChordU - Extracts chords from any song, integrated YouTube.
Flowkey - The easiest way to learn piano with your iPhone or iPad
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.