Feather

Feather are microcontroler's based development board designed by Adafruit that shortly became a new standard. As mentionned by their name, the Feathers are small and light. Feather can also be powered by Lipoly batteries and are suited for embeded projects. Feather exists with a variety of microcontroler as Atmel 32U4, Cortex M0 or M4, ESP8266, ESP32 and many other. The Feather ecosystem involve extension board named Feather Wings (or FeatherWing for short)