Package Request: Nagios XI
Nagios XI™ is the most powerful IT infrastructure monitoring solution on the market. Nagios XI extends on proven, enterprise-class Open Source components to deliver the best monitoring solution for today’s demanding organizational requirements.
http://www.nagios.com/products/nagiosxi/pricing - It’s free for monitoring up to seven nodes.
http://library.nagios.com/library/products/nagiosxi/downloads/main - Downloads page.
(from redmine: issue id 1384, created on 2012-09-11, closed on 2012-09-28)