Not on the market yet, but the app is almost ready for shipping: TILE – a new app in development that will enable you to find things, anything.
Tile is a Bluetooth-enabled device tracker that pairs with your smartphone. It will come in two forms, the Tile Mate, a small, square keychain with a hole in one corner so you can attach it easely to small things. There’s also the Tile Slim, which is a thinner but wider, like a two credit cards, to fit neatly inside a wallet or notebook.
Once you’ve set up a customer account, you can manage up to 10 items to be in the track mode. When something is lost, you can track the lost item alone, or with friends, in a crowdsourcing mode.
compliments
Update 2017: the app did go to the market: Tile App Download Website