Are you a developer? No? Then why are you reading this? This is developer stuff. Heck, I really don't know why I'm writing it, I'm not a developer. I don't even have a beard.
But anyway, if you are an Android app developer, Chainfire has come up with a tool that should make your life slightly easier. Ever notice that even when making a minor change to your app in Eclipse that it takes forfreakingever to build the updated apk file? We're talking 30-35 seconds. Which, to be fair, is basically an hour in internet cat video time.
Chainfire got tired of this problem, and decided to fix it.