Wireless Rope is a free J2ME based Bluetooth application for mobile devices supporting Java funded by the Wearable Computing Lab at the TZI, University of Bremen.. This software shows a visual representation of all the Bluetooth mobile devices in the surrounding and classifies them according to the number of times they come into your range or have interacted with your device.

When lauching the program, it displays a black sphere at the bottom representing the device itself. The blue emitting circles indicate Bluetooth device inquiry activity to detect other devices. A short time after an inquiry phase, other spheres representing Bluetooth devices might appear on the top of the display. These devices are approximately located in a 10 meter radius.
The Wireless Rope collects information about each seen device, including the Bluetooth device class as well as number of sighings and meetings (a meeting is a continuous sequence of sightings).

Download link- http://wrp.auriga.wearlab.de/dl/wr.jad