Highlight
Launched Jan. 24, this buzzed-about app uses GPS to let you know when a friend of one of your Facebook friends is close by
Glancee
Gaining steam, with 10,000 members, the app pinpoints others who are "steps away" and share your interests
Foursquare
One of the first location-sharing apps, it has 15 million users "checking in," a.k.a. broadcasting where they are, to earn perks
OkCupid
Matchmaking gone mobile. This site's Locals feature sorts nearby singles by compatibility
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