Those who have resolved to lose weight in 2013 should consider getting a little help from their friends through Fitocracy, one of the leading fitness apps on the market. This app lets you easily track your workouts and share your progress with like-minded people in an aim to make getting fit feel more like a game. Users gain points as they move toward their fitter selves and are rewarded with brag-worthy badges when they reach their goals. It’s a particularly great app to use if you’ve made a fitness pact with friends this year, as it offers up rankings and leader boards for those with similar goals. Free, for iOS devices; Android app in development.