Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Kilroy - Kilroy is a location-based bulletin board.
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Flamp - Reviews of companies in your city.
LockOnMe - LockOnMe is a location-sharing app, displaying targets and associated Points Of Interest on maps & fun radars.
Foursquare - Foursquare is all about helping you find new ways to explore your city.