A Postman-like MQTT platform with variables and custom MQTT topic buttons.

https://github.com/alsoftbv/topic-lab

It's a Tauri-based app so it has small binaries and supports MacOS, Linux, and Windows.

No screenshots yet, couldn't find the time for marketing work. I'm building features as I am using them. I wanted my colleagues to give it a go first before sharing to the public, but I believe it's already valuable as-is.