Tile: Crowdsourced Lost and Found
Never loose your important stuff again with Reveal Labs' Tile. It's a device that can be easily attached and geo-track your stuff anytime, anywhere. It comes with an iOS compatible application called The Tile App which makes it easier to find things within 50-150 ft range. The application allows crowdsourcing from the community of Tile users to help you locate your lost stuff. A built-in speaker can be activated so you could hear it ring when you're near it.