Foursquare

For moving far beyond check-ins and adding services like daily deals, a recommender, and real-time geolocation alerts. Last year, the location-based social network partnered with Groupon, LivingSocial, and Scoutmob to offer live deals within its mobile app. It also rolled out Radar, an opt-in service that knows where you are and alerts you when you’re near a restaurant or store you’ve saved to your to-do list. And in November, it leveraged the mass of data its collected since launching in 2009–from more than 10 million users and over a billion check-ins–to create a kind of personalized city guide for users logging in from a computer or tablet.