Boards from other manufacturers that are compatible with the Arduino IDE
Pro Trinket 5v is an advanced version of the original Trinket with 5V,18 GPIO and 2k of RAM.
Seeeduino Lotus - ATMega328 Board with Grove Interface combines both the features of the Seeeduino and the Base shield using an ATMEGA micro-controller.
Sparkfun Intel Edison Arduino block helps you to stack up the Arduino along with your Edison.
SparkFun MicroView - OLED Arduino Module is a display unit compatible for your Arduino,which reflects essential data from your Arduino board.
The Intel® Edison contains a lot of features that tend to match all skill sets of the user.
Blend is an integrated developement board, we have "blend"ed Arduino with Bluetooth 4.0A Low Energy (aka BLE or Bluetooth Smart) into a single board.
FLORA is Adafruit's fully-featured wearable electronics platform. It's a round, sewable, Arduino-compatible microcontroller designed to empower amazing wearables projects.
This is LilyPad Arduino - the main board consisting of an ATmega328 with the Arduino bootloader and a minimum number of external components to keep it as small (and as simple) as possible.