With tons of deals on food, vacations, haircuts, and fitness classes, LivingSocial perfectly balances the joy of saving money with the excitement of learning about new stores in your area (thereby tricking you into spending more money). Subscribers are offered one deal per day, and the Facebook app makes it easier for you to take a gander at what deals are out there. The same goes for Groupon’s Facebook app, which offers virtually the same service, but also gives recommendations based on your location and links you directly to a page where you can make purchases.

LivingSocial
LivingSocial matches Facebook users to deals on goods and services based on location.