Golang版本

gmqtt
https://segmentfault.com/a/1190000038643867
https://github.com/DrmagicE/gmqtt
https://github.com/DrmagicE/wire-examples


https://github.com/578157900/mapserver

sugermq
https://github.com/zentures/surgemq
https://github.com/VolantMQ/volantmq

hmq
https://github.com/fhmq/hmq

Java版本

https://github.com/lets-mica/mica-mqtt