SQL operating system instrumentation and monitoring framework
Fast and Lightweight Logs and Metrics processor for Linux, BSD, OSX
Firewall log analyzer
free netflow analyzer
Snare Enterprise: bit.ly/Snare-Trial
OPTOSS Next Gen Network Management System (NG-NetMS)
Log Management Solution
Another C++ Hack
A multi-platform universal log collector and forwarder
PHP 404 pages to trap malicious web requests and report abusers
Real time monitoring : RPi-Monitor always keep an eye on your computer
Utility to move honeyd.log entries to a MySQL database.
Proxies data from stdin/stdout/stderr and logs it in pcap files.
Open Source System and Network Monitoring for Linux Desktop
Passive Proxy Daemon sniffs packets and creates squid proxy logs
Log and track user/computer info in MS Windows environments