Nagios XI is a server and network monitoring software which is enterprises version of Nagios Core.
Nagios XI has enhanced AJAX based user interface. Nagios users can customize their own preferred view of nagios.
It is equiped with in-built graphing capability based on RRD. It has dynamic dashboard provides high level status of infrastructure. Adding new equipments to monitor is done through the web based wizards. Nagios XI also has web configuration interface that allows to configure the Nagios Core.