Facebook Places - Let your friends help you discover restaurants, hotels, museums and more.
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
TransforMap - There are Plenty of Alternatives. TransforMap makes them visible.
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Wherezat - Wherezat is Fast, free, and easy way to share your location with your friend or family.
Google Maps - Find local businesses, view maps and get driving directions in Google Maps.