1up Events - Corporate events as a service
TechEvents.co - Tech and startup events aggregator
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.
Event Hunt - Startups and Tech Events Curated By Locals
Facebook Local - Discover places to go and events happening near you
Sparq Events - 3D Social Networking