ZCollective is a tool used to configure Zabbix using data discovered using MCollective.
At The Scale Factory, we've used Zabbix for monitoring for some time. Our main complaint with this software has been that configuration has always been a bit too GUI-focussed. This has been addressed in recent releases with an improvement in the functionality exposed via the API.
We've written ZCollective to remove some of the GUI legwork required in configuring monitoring for individual hosts - we think it's a cleaner alternative to Zabbix host discovery.