Amazon.com: SONOFF Zigbee 3.0 USB Dongle Plus Gateway, Universal Zigbee USB Gateway with Antenna for Home Assistant, Open HAB etc, Wireless Zigbee 3.0 USB Adapter(1 Pack) : Electronics
I2C Shield for Raspberry Pi 2, 3 & 4 with Outward Facing I2C and Communications Port - store.ncd.io
How to set up deCONZ and Phoscon on a Raspberry Pi and control all your ZigBee devices - Flemming's Blog
How to build your own smart home hub with a Raspberry Pi and the WebThings Gateway
Home Assistant Yellow - Home Assistant
Electrolama zoe - Zigbee Radio for Raspberry Pi zoe Zigbee compatibility
Cloning a Zigbee Light Link Device to a MeshBee
Wireless Shield Board for Raspberry Pi Support Zigbee-Xbee NRF24L01 NRF24L01+RFM12B-D DIY Part
Phoscon - RaspBee Premium - The Raspberry Pi Zigbee gateway
Amazon.com: RaZberry 7 - Z-Wave Plug-On Module for Raspberry Pi, Great for DIY Smart Home. Compatible with Z-Way and Home Assistant : Electronics