Meet the Structure Sensor: a 3D sensor for mobile devices that lets you scan 3D scan objects, map your place, and even try augmented reality gaming. To get started, clip your Structure Sensor to your mobile device, and you are ready to scan people and objects. The device also lets you capture measurements in a room.
The Structure Sensor may be designed for your iPad and iPhone, but you can use it with Windows, Linux, Android, and OS X devices via OpenNI.[where to get it]