TechEvents.co - Tech and startup events aggregator
EventsApp - A simple concise app for creating and sharing events.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.
Facebook Local - Discover places to go and events happening near you
Babble - A more personalized social network