Spotify - Map shows when two people play same song at same time
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
SoundCloud - Enjoy music & follow favourite artists
Clever - syncing between education applications for K-12 schools
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Claroline - Claroline is a collaborative eLearning and eWorking platform.