GoAccess is a real-time web log analyzer and interactive viewer
Enhanced Apache Server Status page - for one or multiple servers
AWStats Log Analyzer
Strong Email & Apache Log Analysis with Active Security Features
A multi-threaded, multi-database tcp-based database insertion app.
Apache Log Parser and Data Normalization Application
Real-time log monitoring in your browser
Open Source SIEM
Python WebServer Log File Analyzer
Squid log data warehouse