Harald Scan is a Bluetooth discovery scanner. It determines Major and Minor device classes according to the Bluetooth SIG specification and attempts to resolve a device’s MAC address to the largest known vendor/MAC address list. Written in Python.
You can download it from the following link: https://packetstormsecurity.com/files/download/83280/haraldscan-src-0.401.tar.gz
Source: https://packetstormsecurity.com/files/83280/Haraldscan-Bluetooth-Discovery-Scanner-0.401.html