zabbix Monitoring Tool
zabbix is an all in one monitoring solution based on an mysql/pgsql backend. All datas are stored in an mysql database which offers great possibilities but on the other hand may have some refutations in the 'single point of failure issue'. anyway.. alexei, aka hugetoad will fix the open issues fast.
zabbix Links
http://www.zabbix.com/ Official zabbix Homepage.
http://sourceforge.net/forum/?group_id=23494 zabbix Helpforum on SourceForge.
Supported Os's
ZabbixDebianPackages by (abi from #pacrew)