Zenly - Zenly is a GPS tracker to locate your friends in realtime.
EventsApp - A simple concise app for creating and sharing events.
YouMap - The Human Atlas™
Event Hunt - Startups and Tech Events Curated By Locals
Babble - A more personalized social network
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.