The M5Stick-C is an ESP5 powered M5Stack mini. It's a portable, easy-to-use, open source IoT development board.

Arduino Development Board Module ESP8266 with WiFi OLED.

The Console Module with Buttons for Micro: Bit is an expansion gamepad based on micro: bit. You just need to connect the micro: bit, and it will turn into a wireless remote control or a wireless gaming console.

Development Board ESP32-DEVKITC-S1.

Power:Bit is an expansion card of Micro: Bit of reduced size. It is powered by 2 CR2025 button batteries and has a buzzer.

This is a Speaker Expansion Module designed for the BBC micro:bit.

Get more from :MOVE mini for the BBC microbit with the servo driven Bulldozer Add-On. Code it via the MakeCode Editor and use your buggy as a construction robot.

This is a 1.8" Colorful Display Module designed for the BBC micro:bit.

The SparkFun weather:bit  is a fully loaded “carrier” board for the micro:bit that, when combined with the micro:bit, provides you with a fully functional weather station.

The ESP8266 Thing is a breakout and development board for the ESP8266 WiFi SoC – a leading platform for Internet of Things (IoT) or WiFi-related projects. The Thing is low-cost and easy to use, and Arduino IDE integration can be achieved in just a few steps.