Phoscon - RaspBee Premium - The Raspberry Pi Zigbee gateway
Serial Converter, Raspberry Pi to Zigbee, RS485, RS232, USB, TTL – Widgetlords Electronics
Phoscon - RaspBee Premium - The Raspberry Pi Zigbee gateway
ZIGATE - ZIGBEE PiZiGate universal gateway for Raspberry Pi
ZBR1 – Zigbee board for Raspberry Pi from 2 Green Homes on Tindie
Cod.m's Latest Zigbee Module Turns Your Raspberry Pi Into a Coordinator for 50 Direct Children - Hackster.io
ZigBee Module can be use on Raspberry Pi from chimer on Tindie
I2C Shield for Raspberry Pi 2, 3 & 4 with Outward Facing I2C and Communications Port - IoT Devices & Sensors | Relay Controllers, Current Monitoring & Vibration Sensors