
Description: MQTT.fx is a free, open-source MQTT client that allows you to test MQTT servers. It has a simple, easy-to-use interface for publishing and subscribing to topics, along with handy features like a topic hierarchy view.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: MQTTBox is an open source MQTT client tool that enables users to easily test and debug MQTT clients and brokers. It features an intuitive UI with message logging, topic subscription, and publishing capabilities for working with MQTT.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API