RPi Bluetooth LE
Control Bluetooth LE Devices From a Raspberry Pi
New Raspberry Pi W iBeacon Software
Install Bluez on Raspberry Pi
Getting BLE to behave on the Pi
How to Deploy BlueZ v5.48 on Raspberry Pi 3
BLE iBeacon Scanner - iBeacon and Eddystone Beacons
Beacon Server for Raspberry Pi 3 and OS X
How to Parse Bluetooth Beacons (iBeacon and Eddystone) with Arduino 101
Raspberry Pi Python3 Bluetooth device Scanner
Also see Linux.