Xappr
We'll admit it: When we look at our iPhones, the phrase "boy, what this thing really needs is a gaming pistol add-on" isn't the first thing that comes to mind. Yet we're still drawn to the Xappr ($30). This gaming gun features a clamp-like mount to hold your device, which it communicates with via the headphone port, letting you exercise your itchy trigger finger in a variety of games (can you say iLazer Tag?). Holster not included. [via]