A popular free tool. Includes full C source code. Pre-built executables are available for Windows and Mac.

An open source log analyzer. Along with the usual web statistics of pages, hits, also shows busiest hours, a search engine breakout with keywords, robots, and broken links. Works with IIS or Apache using a Perl script, GNU GPL.

A free open-source image based page tracker. Reporting generates W3C-compliant HTML and PNG images.

Perlscript for website logfiles: See the hits for each page graphed over time, with many other useful reports also. GPL.

Analyzes the referer log, detects and evaluates gateways, identifies keywords, and breaks down accesses per document and per referring domain. Written in Perl. [Open Source, GPL]

A Free software oriented company, MaxMind provides freely available databases and APIs called GeoIP, and commercial services, for finding the approximate geographical location of IP addresses. See also Geolizer and AWstats for GPL'd GeoIP-based log analysis.

Allows users on shared hosting plans (who may not have access to site logs) to create site logs. Freeware, but users need permissions for CGI, Perl and SSI.

A fast logfile analyzer for web servers. It creates a comprehensive statistics report in HTML and VRML format. Free for non-commercial use.

Flexible command line shell program for Apache log file analysis.

A logfile analysis program by Jan Winkler.