It's hard keeping track of what acts are playing in your area at any given time. Setlist (Free) makes it easy, by linking to your Rdio account and automatically showing shows by artists in your collection that are playing near you. Find a show you're interested in? Tap on it, and the Songkick integration takes over, showing you ticket prices, venue info, and more. Bottom line? It's free, so if you're a Rdio user, there's little reason not to give it a try.