Considerably more detail about Google Mobile Maps new functionality to locate mobile devices via GPSes or via nearby cell towers, including a list of supported devices and speculation about this feature’s inclusion in the Android platform.

is a service daemon that monitors one or more GPS units attached to a host computer through serial or USB ports, making all data on the location/course/velocity of the sensors available to be queried on TCP port 2947 of the host computer

‘a free service that will track a “friends” GPS-enabled cell phone from another phone (GPS not required) or on the web. Mologogo also serves as a dirt-cheap tracking system, so go ahead and fauxjack something.’

Buy GPS devices including in-car sat nav and recreational navigation in the UK

Share one GPS between several applications.