Map Multiple Locations by Address
IP Address Geolocation to Identify Website Visitor's Geographical Location
WorkSnug - Connecting mobile workers to the nearest & best places to work
Mezzoman - V3 - Meet in the Middle!
RendezvousSpot.com - Find a place to meet so nobody's stuck driving the whole way.
Nearby Tweets - Search, find, and watch local Twitter tweets from local users and businesses
5 Alternative Ways to Search Twitter for People by Location
#HootTip: Geo-Located Search - HootSuite Social Media Management
Plan B - Android Apps on Google Play
The Farm