Wave Concerts - Next-level virtual shows & concerts
Gnoosic - Even if you don't know what you are looking for - gnod will find it.
Concert Window - Online music venue
Musicroamer - A visual Pandora for discovering new music
Concert Playlists - Listen to any concert, any time
TasteDive - TasteDive recommends similar music (musicians, bands), movies, TV shows, books, authors and games, based on what you like.