Screaming Penguin - Source Does Matter

Zabbix is a very very good Linux system monitoring tool. It can do all kinds of stuff in a strightforward and flexible manner. IF you missed my hearlier review check it here.

First BETA is out, many enhancements and bugfixes. Check it out, see screenshots, more details, get it, etc via the link --->   http://zabbix.sourceforge.net/