Observium - network monitoring system
I've just read about this in the last issue of Linux Format - looks like it could be useful to some of us.
Observium is an autodiscovering PHP/MySQL based network monitoring system focused primarily on Cisco and Linux networks but includes support for a wide range of network hardware and operating systems.
Observium has grown out of a lack of easy to use NMSes. It is intended to provide a more navigable interface to the health and performance of your network. Its design goals include collecting as much historical data about devices as possible, being completely autodiscovered with little or no manual intervention, and having a very intuitive interface.
Observium is not yet intended to replace an existing Nagios-type monitoring system, but rather to complement it with intuitive representation of historical and current performance statistics, configuration visualisation and syslog capture.
Main Page - Observium