NagAmp interfaces a Cleware 'ampel'-device (a traffic light) to Nagios.
When all is fine, the green light lights up, etc.
This program requiresClewareControl to be installed.
0.0.31 fixed a compilation problem 0.0.30 now switches off all leds when not running 0.0.26 added Nagios 3.0 support, stability fixes 0.0.23 not always displayed the correct state 0.0.22 removed unnecessary includes from Makefile and fixed mix-up of green and red leds 0.0.21 initial release
Links
You might be interested in CoffeeSaint: an application that shows the status of Nagios (version 1 up to 3 and the newer XI) on a screen. It can, if there are no errors, display a Webcam feed. If an error status occurs, it can play a sound. One can configure it to display certain errors/warnings always on top. It is remotely configurable via a built-in Web interface.