Flowkey - The easiest way to learn piano with your iPhone or iPad
Clever - syncing between education applications for K-12 schools
Yousician - Learn to play music at home, at your own pace
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.
Claroline - Claroline is a collaborative eLearning and eWorking platform.