Kajabi - Kajabi is the only Knowledge Commerce platform today with everything you need to market, sell, and deliver your knowledge online.
Magic Playlist - Get the playlist of your dreams based on a song
Tendenci - Tendenci - The Open Source AMS is a cloud-based all-in-one management SaaS solution for Non-profits and Associations.
Spotalike - Spotify playlist with similar songs, according to Last.fm
ChamberMaster - ChamberMaster is a member management software.
Spotify - Map shows when two people play same song at same time