MQTT
Zigbee2MQTT
Zigbee-to-MQTT bridge for running Zigbee smart-home devices without vendor hubs.
eKuiper
Lightweight edge stream processing engine — filter, transform, and route IoT data at the edge with SQL-like rules.
EMQX
Scalable open-source MQTT broker — connect IoT devices, microcontrollers, and sensors at any scale.