While developing IoT projects, I've always needed a messaging server, which was located on my cloud servers. But the thing is, not everyone able to use their own cloud services.
There are several great IoT messaging services like Blynk, EasyIoT, Cayenne.. But if you like to have something from scratch for MQTT, there aren't too many options.
A very good example of online MQTT broker is CloudMQTT of Amazon. But normally, it is limitied.
MaQiaTTo aims to create an alternative way of managing your online broker.
You can simply start with registering and creating topics, so you're ready to go.
And test your account via Websocket or shell client:
You can take a look at examples and of course current limitations.
Any feedback is appreciated!