visualization addon for Nagios or Icinga

 NagVis can be used to visualize Nagios or Icinga data, for instance
 to display network traffic or IT services such as email.
 .
 Its key features are:
  * Display of single hosts or services;
  * Representation of a host dependent on the state of its services;
  * Visualization of complete host- or servicegroups with one icon;
  * Organization of hosts/services/groups into Sub-Map icons;
  * Graphical representation of complete IT systems.