Frill - A better way to collect customer feedback
Synthesia - A fun way to learn how to play the piano.
Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.
Playground Sessions - Online piano learning game.
Prowess - The simplest way to collect and leverage product feedback
Piano From Above - Piano From Above is a program that turns learning the piano into a videogame.