MQTTBox - MQTTBox enables to create MQTT clients to publish or subscript topics, create MQTT virtual device...
ZeroMQ - ZeroMQ is a high-performance asynchronous messaging library.
mosquitto - Eclipse Mosquitto is an open source (EPL/EDL licensed) message broker that implements the MQTT protocol versions 5.0, 3.1.1 and 3.1. Mosquitto is lightweight and is suitable for use on all devices
ubus - User space inter process communication that adheres to the Unix philosophy.
HiveMQ - HiveMQ is the MQTT based messaging platform for fast, efficient and reliable data movement to and from connected IoT devices and enterprise systems
RabbitMQ - RabbitMQ is an open source message broker software.