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