Zephyr supports a long list of development boards including the new Reel Board from PHYTEC. The Reel Board was developed by PHYTEC in cooperation with the Zephyr Project for a Hackathon held during the Embedded Linux Conference in October 2018. The company is now selling the board and it is a great entry point into the world of microcontrollers, sensors, Bluetooth and IoT.
Read more at Reel Board Review.