Observium
Observium is an auto discovering PHP/MySQL/SNMP based network monitoring which includes support for a wide range of network hardware and operating systems including Cisco, Linux, FreeBSD, Juniper, Brocade, Foundry, HP and many more. Observium is not intended to replace an up/down alerting system, but rather to complement it with an easy to manage, intuitive representation of historical and current performance statistics, configuration, visualization, and syslog capture.