Spotify - Map shows when two people play same song at same time
ConcertWith.me - Spotify for live music
Playlist Machinery - Tools that help you create & organize your Spotify playlists
1001 Tracklists - The world's leading DJ tracklist database ♫ best free mixes, club + festival livesets with playlist ♫ hot EDM songs, fresh charts, news & more
Magic Playlist - Get the playlist of your dreams based on a song
Concert Playlists - Listen to any concert, any time