Zenly - Zenly is a GPS tracker to locate your friends in realtime.
1up Events - Corporate events as a service
ToT: ThisOrThat - Let your friends choose this or that for you
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.
sup - The first creep-free way to see nearby friends
Facebook Local - Discover places to go and events happening near you