Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
Flowkey - The easiest way to learn piano with your iPhone or iPad
Cello - Weave creates a virtual network that connects Docker containers deployed across multiple hosts and enables their automatic discovery.
Yousician - Learn to play music at home, at your own pace
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.
Pay2View - Let your users pay to view content using PayPal.