1up Events - Corporate events as a service
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Facebook Local - Discover places to go and events happening near you
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
EventsApp - A simple concise app for creating and sharing events.
EventMobi - EventMobi is an interactive mobile event app, audience response and engagement platform for conferences and trade shows.