The Micro:bit is an open source board, designed by the BBC, for use in schools in the United Kingdom. It uses a Nordic nRF51822 SoC and has an Bluetooth LE, accelerometer, magnetometer, two buttons and 25 LEDs.
Technical Specifications
GutHub
Reference Design
Radio Packets
BBC micro:bit MicroPython documentation
MicroPython Editor
Using Multiple Channels on the Bitty Software Data Logger
Mu and micro:bit
Capacitive Touch With micro:bit
Workbench
Scanning for Bluetooth Beacons on the Linux command line
microBlocks
Microsoft MakeCode
Getting Started with the micro:bit IO Pin Service
Using App Inventor with BlueZ
micro:bit BLE from the Raspberry Pi
Creating an Android App for your micro:bit
Awesome micro:bit