Stuck in a new city without a clue as to where to eat? No worries. Just fire up your handy Yelp app, which locates all the nearby eateries, then browse by proximity, neighborhood, price, or what's open now. You also get easy access to Yelp's burgeoning collection of customer reviews, so you can avoid any clunkers. Not hungry? The app lets you find a whole host of other on-the-road necessities, such as bars, banks, drugstores, and gas stations.