Genmon is a simple monitoring system written in Perl, that can be configured to monitor
services and output results as PNG images.
It was built by Craig Macdonald for use on freeASPhost.co.uk, but is loosely based on code by Piers Kent
It is simlar to MRTG but is used to monitor the status as opposed to the usage of services. You can see an example of Genmon in use at freeASPhost.co.uk.