setlist.fm - A comprehensive wiki of upcoming concerts 🎶
Jukely - Go to hundreds of concerts for one monthly fee 💃
Concert Playlists - Listen to any concert, any time
Sporteventus for iOS - The worldwide search engine for sporting events and tickets
ConcertWith.me - Spotify for live music
TicketHarbor - The safer Craigslist for P2P ticket exchanges