Flowkey - The easiest way to learn piano with your iPhone or iPad
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.
Real Piano Teacher - Real Piano Teacher is a music learning application that lets you learn how to play the piano, organ, flute, Guitar, and many other instruments just in seven days.
Simply Piano - Fast and fun way to learn piano
HDpiano - HDpiano is the Netflix of Piano Tutorials.
Learn to play Guitar - Learn to play Guitar is an application that is designed to learn or play various guitar tones like Rock, Blues, Jazz, Latin music, and other contemporary styles on Guitar.