Node.js

A good javascript MQTT library is MQTT.js .

To truly demonstrate the power of node.js together with MQTT we have created an application which subscribes to a MQTT topic and streams that to the browser via SSE .

You can find the code for the example here: https://github.com/CloudMQTT/mqtt-sse . And you can even test out the application here: http://mqtt-sse.herokuapp.com