Netduino
Netduino is an open-source electronics prototyping platform based on the .NET Micro Framework. It uses a 32-bit ARM-microcontroller. The Netduino boards (except the Mini and Go) are designed to be pin-compatible with most Arduino shields.[1]
Hardware
The original Netduino is based on an Atmel AT91SAM7X processor running at 48 MHz.[1]
Netduino plus
The Netduino plus adds an onboard Ethernet port and a microSD card reader.[1]
Netduino mini
The Netduino mini is a smaller breadboard mountable Netduino in a DIP package.[1]
Netduino 2
The Netduino 2 is based on a STMicro STM32F2 microcontroller from STMicroelectronics. It has a clock frequency of 120 MHz, 192 kB of code space, 60 kB of RAM and 22 GPIO-pins. It also has hardware support for 6 PWM-channels, 4 UART-channels, I²C and SPI.[2]
Netduino plus 2
The Netduino plus 2 is similar to the Netduino 2, with a faster 168 MHz STM32F4 microcontroller and an Ethernet port and microSD slot added.[2]
Netduino go
With Netduino Go, all the peripherals are virtualized, with 8 gobus ports replacing the Arduino headers. Additional modules can be added through these ports, and each module has a small microchip which works together with the mainboard.