Nagios Open Source network monitoring software - The Standard In ITM
Open Source Monitoring System for performance and availability.
Graphical network monitoring and documentation tool
Full-featured enterprise network management tool
Intelligently block brute-force attacks by aggregating system logs
Manage and interpret IPMI systems with common a software tool
Performance Data collector for Monitoring.
ITIL conform CMDB solution for documenting your entire IT landscape
Xymon monitors your hosts, your network services, and everything else.
Enterprise-class, distributed monitoring solution for networks & apps
Snare Enterprise: bit.ly/Snare-Trial
Monitorix is a system monitoring tool
Continuously monitor server connections