Shazam - Shazam is a mobile app that recognizes music and TV around you.
Jukely - Go to hundreds of concerts for one monthly fee 💃
Acclaimed Music - Acclaimed music is a top music recommendation tool that showcases the most popular song based on which is currently topping the Billboard charts and provides links to the latest music news.
Sporteventus for iOS - The worldwide search engine for sporting events and tickets
Spotify - Map shows when two people play same song at same time
TicketHarbor - The safer Craigslist for P2P ticket exchanges