Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Kibii - Discover exciting things to do!
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
EventsBase - Find the best professional events nearby or globally
OwnTracks - Cross-platform location sharing
Event Finda - Find events near you, and all around the world.