Bluefog

Bluefog is a tool that can generate an essentially unlimited number of phantom Bluetooth devices. It can be used to test Bluetooth scanning and monitoring systems, make it more difficult for attackers to lock onto your devices, or otherwise complicate the normal operation of Bluetooth devices. Technically, Bluefog can work with just one Bluetooth adapter, but it works much better when you connect multiple adapters. Up to four radios are currently supported simultaneously.