zmq seems like an interesting tool for building task queues and other types of messaging apps. the other option i’m looking at is rabbitmq which has some interesting features like mqtt bridges and federation, but as a result involves a broker. i would like to eventually have all of the ships systems (or at least on the inter-system boundary) communicate over a brokerless messaging protocol. off the shelf env devices and trackers all communicate over an mqtt bridge so some brokering is probably unavoidable without getting into fully custom tech, but that’ll blow the budget.