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GoAccess is a real-time web log analyzer and interactive viewer
AWStats Log Analyzer
Read Exchange Server SMTP Send and Receive Logs
Bubbles the simple, easy to use HTTP web server, browser controlled
Strong Email & Apache Log Analysis with Active Security Features
Real-time traffic analysis for your website for 100% FREE
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A decade old shell script to ease postfix log analysis
Python WebServer Log File Analyzer
PHPIDS-based Security Log Analyzer for Apache
Command line client interface for LOGalyze 4
Project's new home: https://github.com/Stunner/FileZilla-Log-Analyzer