The Netduino 2 is an 32-bit open source electronics platform using the .NET Micro Framework with a rich development environment.
Netduino Plus 2 expands on the impressive 32-bit open source Netduino by adding ethernet connectivity and an SD card socket.
This shield allows you to use a computer power supply (or other power source) to use your Arduino to switch high current.
The Solarbotics Arduino Freeduino Enclosure (SAFE) is a laser-cut acrylic case for your chopsticks. And by chopsticks, we mean Arduino or Freeduino. Go figure.
Have all of the digital logic and analog circuitry necessary to implement a full-speed USB peripheral/host controller with your Arduino. Use it to interface and control any USB slave device - thumbdrives, digital cameras, bluetooth dongles, game controllers, Android phones and more!