Currently, I am developing and maintaining an online MQTT Broker for your IoT projects. It is called Maqiatto.
I kindly ask you to support me to afford cloud instance costs of the web server and MQTT broker which are running on Amazon Web Services.
As an IoT developer, I know that there are too many front lines in IoT to fight with them. Cloud connectivity is one of them and I am glad to say this will not be a problem for your projects, just enpower them with Maqiatto.com.