Gratuito, e vem embalado em muitas distribuições Linux, é The Webalizer .
The Webalizer is a fast, free web server log file analysis program. It produces highly detailed, easily configurable usage reports in HTML format, for viewing with a standard web browser.
Handles standard Common logfile format (CLF) server logs, several variations of the NCSA Combined logfile format, wu-ftpd/proftpd xferlog (FTP) format logs, Squid proxy server native format, and W3C Extended log formats. In addition, gzip (.gz) and bzip2 (.bz2) compressed logs may be used directly without the need for uncompressing.