The HackRF project is developing an open source design for a low cost Software Defined Radio (SDR) transceiver platform. SDR technology allows a single piece of equipment to implement virtually any wireless technology (Bluetooth, GSM, ZigBee, etc.), and we hope the availability of a low cost SDR platform will revolutionize wireless communication security research and development
throughout the information security community.
Official web site: http://greatscottgadgets.com/hackrf/
Official github: https://github.com/mossmann/hackrf