Open Source Monitoring System for performance and availability.
Nagios Open Source network monitoring software - The Standard In ITM
A Java based fault and performance management system
Monitoring and reporting web gui for Bacula
free netflow analyzer
Node Application Metrics provides a foundational infrastructure
Xplico is a Network Forensic Analysis Tool (NFAT)
Easily monitor network infrastructure services
Standalone web application allowing to monitor end points availability
Visual Network Management System
Tools to help you control IT systems and escape their control over you
Is your host up or down?
A simple cacti viewer for smartphones
Web based management tool for unixes