GoAccess is a real-time web log analyzer and interactive viewer
Bubbles the simple, easy to use HTTP web server, browser controlled
AWStats Log Analyzer
Log analyser for Squid access.log
ISC dhcpd leases usage analysis
Real-time log monitoring in your browser
Real-time traffic analysis for your website for 100% FREE
A decade old shell script to ease postfix log analysis
Workflow Designer, Hive Editor, Pig Editor, File System Browser
Python WebServer Log File Analyzer
Free-SA is report generating tool for web, proxy and mail log files
PHPIDS-based Security Log Analyzer for Apache
Log text into graph on python and javascript.