Spotify - Map shows when two people play same song at same time
Sporteventus for iOS - The worldwide search engine for sporting events and tickets
Magic Playlist - Get the playlist of your dreams based on a song
Jukely - Go to hundreds of concerts for one monthly fee 💃
Playlist Machinery - Tools that help you create & organize your Spotify playlists
TicketHarbor - The safer Craigslist for P2P ticket exchanges