Spotify - Map shows when two people play same song at same time
Kajabi - Kajabi is the only Knowledge Commerce platform today with everything you need to market, sell, and deliver your knowledge online.
SOUNDS - Discover music with friends
Tendenci - Tendenci - The Open Source AMS is a cloud-based all-in-one management SaaS solution for Non-profits and Associations.
Songlink - Share music with anyone.
YourMembership - YourMembership provides membership management software integrated with social networking features.