The most scalable open-source MQTT broker for IoT, IIoT, and connected vehicles

MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker). The implementation is based on the documentation from https://mqtt.org/.

A Powerful and All-in-One MQTT 5.0 client toolbox for Desktop, CLI and WebSocket.

C/C++ server and network library, including coroutine,redis client,http/https/websocket,mqtt, mysql/postgresql/sqlite client with C/C++ for Linux, Android, iOS, MacOS, Windows, etc..

An ultra-lightweight and blazing-fast Messaging broker/bus for IoT edge & SDV

HiveMQ CE is a Java-based open source MQTT broker that fully supports MQTT 3.x and MQTT 5. It is the foundation of the HiveMQ Enterprise Connectivity and Messaging Platform

Gmqtt is a flexible, high-performance MQTT broker library that fully implements the MQTT protocol V3.x and V5 in golang

A highly configurable MQTT message router, where the routing targets are notification plugins, primarily written in Python.

HiveMQ MQTT Client is an MQTT 5.0 and MQTT 3.1.1 compatible and feature-rich high-performance Java client library with different API flavours and backpressure support

🕹 MQTT Protocol Analysis and Coroutine Client for PHP. Support for 3.1, 3.1.1 and 5.0 versions of the MQTT protocol.

Toolkit is a IoT protocol client CLI for IoT developer and learners. CoAP、MQTT And NB-IoT protocol are currently supported. It supports colors, autocompletion, internationalization(chinese, english and german…) and multi-platforms

reactor3实现的mqtt库

Cross platform MQTT client for MQTT debugging and message inspection. It is based on the .NET library MQTTnet.

Software to manage a Linux-based All Sky Camera.

A Lightweight and fully asynchronous MQTT client C library based on libev

MQTT Datasource for Grafana allows streaming data from any MQTT broker running either locally or remotely.

luamqtt - Pure-lua MQTT v3.1.1 and v5.0 client

Async Mqtt encoder and decoder for rust.

Diagnostic-oriented MQTT client tool. Supports MQTT 5.0 and 3.1.X protocols, connections to multiple brokers, MQTT operations logs and multiple subscribe widgets with unique/history topic filtering mode. Saves configuration in browser's local cache.

A dead-simple, extensible MQTT implementation well suited for embedded systems.