Arduino ModFLEX Shields by LS Research
SiFLEX02 or ProFLEX01 module, w/ high performance IEEE 802.15.4 radio & MCU in pre-certified footprint.

LS Research TiWi-R2 Integrated Transceiver Module
High performance 2.4 GHz IEEE 802.11 b/g/n Bluetooth 2.1+EDR radio in cost effective, pre-certified footprint.

LS Research ProFLEX ZigBee Pro Module
Features adjustable output power for long-range applications.