Flowkey - The easiest way to learn piano with your iPhone or iPad
Lexica - An open source word-search game.
Yousician - Learn to play music at home, at your own pace
Quackle - Open-source word game similar to Scrabble. Features a board editor, analysis tools, and artificial intelligence that rivals the best players in the world!
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.
Words With Friends - Play Words With Friends Free, the #1 mobile word game, with both your Android and...