SQL operating system instrumentation and monitoring framework
free netflow analyzer
Firewall log analyzer
Performance Data collector for Monitoring.
JENNOM - Java Enterprise Network Nodes Monitor
Snare Enterprise: bit.ly/Snare-Trial
Enterprise-class, distributed monitoring solution for networks & apps
OPTOSS Next Gen Network Management System (NG-NetMS)
360-FAAR Analyze FW1 Cisco Netscreen Policy Offline Using Config/Logs
Free portable cross-platform graphical multi pinger, 100%-pure java
IP Monitor notifies you when your public IP address changes
Real time monitoring : RPi-Monitor always keep an eye on your computer
Network performance monitoring and logging script for Cisco devices.