Amazon.com: Edimax EW-7811Un 150Mbps 11n Wi-Fi USB Adapter, Nano Size Lets You Plug it and Forget it, Ideal for Raspberry Pi / Pi2, Supports Windows, Mac OS, Linux (Black/Gold) : Electronics
Edimax EW-7622UMn 300Mbps Wireless 802.11b/g/n USB Adapter - 300Mbps, 802.11 b/g/n, USB 2.0 at TigerDirect.com