runstar: A frankly gorgeous running application—no really, it might be the most beautifully designed Android app I've ever seen—that turns running into a social network game, with goals and competitions against your friends, along with everything else you'd expect from a running app, like different kinds of runs, full stats tracking and a built-in music player app. There's also a "power up" mode that switches up the visuals and plays your starpower song. Did I mention it looks amazing? It's free.