We are planning on using a standard MQTT backend. Currently working with mosquito. There are some ancillary scripts, but not too many.
Sorry, wasn't asking about the messaging protocol and broker (I 360% would opt for MQTT as well (reminds me a have open mosquitto's around for my home automation and geo tracking, gotta lock some stuff down :-) ))
But it cannot do much alone, I was wondering what the rest would be implemented in, provisioning tools & website, the cmd.pl remplacement, and what choices (plural) have been made about data storage?