Meet the Lymbit system: an app-enabled tracking solution that helps you locate your lost items. You can rely on your smartphone, smartwatch, or Google GLASS to find your things. The system helps you track the last known location of your things. Since these trackers have an accelerometer, you get a notifications when there is any movement. Buyers can control an unlimited number of Lymbit devices.
The companion app lets you perform a proximity search with a range of 50 meters. The battery should last you over 400 days. You can find this project on Indiegogo.