reloadhot

From Qt4.5 the Qt is also licensed under LGPL, so you can create a commercial software too. Thats great!

Zabbix is a great Network Management System. It has all what I want:
- SNMP v1, v2, v3
- own agent collect information from Linux, Windows ...
- great web interface written in PHP
- generate alert, graphs, SLA
- well documented
- very stable !!!

New in v 1.6:
- Zabbix proxy = it's a gateway to forward results from agent to master server, great for distributed monitoring
- Nice graphs = 2D and 3D
- Support IPMI
- Optimized SQL for better speed
- and many more.

I am using Zabbix for about 2 years a I can say its perfect. I think it's a best monitoring system I ever seen.