Webalizer - fast web server log file analysis
The Webalizer is a fast web server log file analysis program. It produces highly detailed, easily configurable usage reports in HTML format, for viewing with a standard web browser. It 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.It supports IPv4 and IPv6 addresses, includes built-in distributed DNS lookup capability and native Geolocation services. It supports more than 20 languages.