Google has launched Eddystone, a new open-source Bluetooth LE beacon platform which plays nicely with iOS, Android, and other OSes. Aiming to power a new age of location-based services, as well as give those responsible for managing a flock of Bluetooth beacons the tools to make sure they're working properly, Eddystone arrives with two main features: telling mobile devices exactly where they are and what's nearby, and linking a physical location with online data.