Phone? Check. But where are my keys? And did I leave my flash drive at the office? GPS-enabled devices, like smartphones, make keeping track of gear easy. But sometimes I need a locator for low-tech (or no-tech) stuff, like the remote control or my luggage. I'm apparently not alone, as indicated by the emergence of Bluetooth locator tags and their companion apps, which literally attach to anything to offer find-it radar maps for all of the essentials.