See where your friends are partying on a Saturday night, let people know that you’re at your favorite coffee shop or peruse customer reviews of nearby restaurants with this social media app designed for people who actually want to be social. You can even score discounts and free stuff from some merchants for checking into their businesses. The quest to become a location’s “Mayor” and badges for unlocking achievements give Foursquare an addictive quality, too.
Link: Foursquare