Netduino is an open source electronics platform using the .NET Micro Framework. Featuring a 32-bit microcontroller and a rich development environment, it is suitable for engineers and hobbyists alike.

The Netduino Plus is just like the Netduino, with Ethernet cooked in already! There is a full TCP/IP stack with examples ready to go, and a microSD card slot for storing files

Input! Output! Interface with switches, sensors, LEDs, serial devices, and more. Netduino offers 20 GPIOs combined with SPI, I2C, 2 UARTs (1 RTS/CTS), 4 PWM channels and 6 ADC channels. Code! Debug! Repeat!

.NET Micro Framework combines the ease of high-level coding and the raw features of microcontrollers. Enjoy event-based programming, multi-threading, line-by-line debugging, breakpoints and more.

To get a glimpse of how its done, check out the basic 'getting started' guide You can even now use the Netduino on Linux & Mac computer using open source Mono instead of .NET

And its very expandable just like the Arduino!

3rd-party accessories offer pre-built functionality like GPS location, servo control and battery power. Netduino is also pin-compatible with Arduino shields. 3rd-party drivers are required for some Arduino shields.

Design files included.
Netduino is an open source electronics platform. All design files and source code are included. Learn from the designs. Remix, and enjoy the freedom of open source.

Comes with a free microUSB cable and 4 rubber bumpers For tutorials, files, project ideas and more check out netduino.com