Realguitar - Real Guitar is one of the most realistic guitar simulator apps featuring a user-friendly interface...
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.
Guitar Pro 7 - Create, play and share your tabs
Flowkey - The easiest way to learn piano with your iPhone or iPad
The Binding of Isaac - The Binding of Isaac is a 2011 independent video game designed by Edmund McMillen and Florian Himsl.
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.