Nightout - The standard in event ticketing and marketing by NIGHTOUT
TicketHarbor - The safer Craigslist for P2P ticket exchanges
Airbnb - Book unique places to stay and things to do.
SplitTiks - Reserve your event tickets for a fraction of the price
Sporteventus for iOS - The worldwide search engine for sporting events and tickets
TickPick - Purchase tickets to your favorite events with no hidden fees