USPS for Mobile
The U.S. Postal Service might get a bad rap for its long post office lines or excessive bureaucratic red tape, but it seems to have its app-building act together. USPS for Mobile is a free app for Android and iOS devices that keeps tabs on shipments, calculates shipping costs, looks up post office locations and zip codes, schedules pickups and a whole lot more. And on devices with a camera, it can even scan and identify incoming packages.