You know what; I use ZeroMQ all the time. Thanks for bringing to my attention that the community is waning, I will look into contributing to it tonight.
Great! One thing I do is have an RSS feed from a reddit search query so I can lurk random discussions that mention "zeromq". I'll then see if there is something I can do to encourage or contribute to whatever is happening. There is also a mailing list and a VERY low traffic IRC channel on libera.chat.