Electric Imp Cortex-M3 core gives great performance combined with low power consumption 802.11b/g/n WiFi with WEP, WPA and WPA2 encryption 6 I/O - UARTs, I2C, SPI, analog in and out, PWMs, GPIOs... all selectable under software control No SDK to install, no JTAG pods, no long download times... you develop your code in a browser-based IDE http://electricimp.com