Fast and Lightweight Logs and Metrics processor for Linux, BSD, OSX
ISC dhcpd leases usage analysis
AWStats Log Analyzer
Enhanced Apache Server Status page - for one or multiple servers
repair corrupted pcap and pcapng files
Snare Enterprise: bit.ly/Snare-Trial
Open Source SIEM
Free-SA is report generating tool for web, proxy and mail log files
Squid log data warehouse
Utility to move honeyd.log entries to a MySQL database.
Command line client interface for LOGalyze 4
Hadoop, Hbase, HBase Web Client, Flume based log analytics system
Monitoring your infrastructure for free.