Satellite Eyes - Changes your Mac wallpaper to a satellite map of your local
Flowkey - The easiest way to learn piano with your iPhone or iPad
Spire - The first activity, breath & state of mind tracker
Yousician - Learn to play music at home, at your own pace
Hum - Songwriting for iPhone
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.