Flowkey - The easiest way to learn piano with your iPhone or iPad
Swatches - A fun and accurate color picker for the real world
Jameasy for Violin - Play rhythm game with a real violin. you can play with background music and real-time feedback
ColorSnapper - The missing color picker for Mac.
alphaTab - alphaTab is a cross platform music notation and guitar tablature rendering library.
Colordot for iOS - A color picker for humans.