ZABBIX :: Open Source Application and Network Monitoring Solution

All-in-one 24x7 monitoring solution without high cost.

ZABBIX is software for monitoring of your applications, network and servers. ZABBIX supports both polling and trapping techniques to collect data from monitored hosts. A flexible notification mechanism allows easy and quckly configure different types of notifications for pre-defined events.

cactiと比べるとどうだろう。後で試してみよ。