Netduino

Software, meet hardware.

Netduino is an open source electronics platform using the .NET Micro Framework.

Featuring a 32-bit microcontroller and a rich development environment.
Suitable for engineers and hobbyists alike.

http://www.netduino.com/netduino2/

http://www.netduino.com/netduino2/
http://www.netduino.com/netduino2/

http://www.netduino.com/netduino2/specs.htm

processor and memory
  ● STMicro 32-bit microcontroller
  ● Speed: 120MHz, Cortex-M3
  ● Code Storage: 192 KB
  ● RAM: 60 KB
digital i/o features
  ● all 22 digital and analog pins: GPIO
  ● digital pins 0-1: UART 1 RX, TX
  ● digital pins 2-3: UART 2 RX, TX/PWM
  ● digital pins 5-6: PWM, PWM
  ● digital pins 7-8: UART 3 RX, TX
(also works as UART 2 RTS, CTS)
  ● digital pins 9-10: PWM, PWM
  ● digital pins 11-13: PWM/MOSI, MISO, SPCK
  ● digital pin SD/SC: SDA/SCL
(also works as UART 4 RX, TX)