Web Log Suite is an useful application with a GUI/command line powerful log analyzer.
    This fast and powerful log analyzer can generate detailed and easily configurable dynamic reports that allows you to explore deep into your website data. These reports are generated in various languages output to screen, email, ftp, file or network directories. This analyzer will explore the roots of the log reports and provides details like: list of visitors, activity statistics, file access statistics, information about referring pages, search engines, errors, visitor country, referring sites, complete information about search words and phrases. This other features included are: reports are in the HTML format, exports log file to databases via ODBC, supports interactive web server log analyzer, parsing search phrase encoded in UTF-8 char set, and much more.
    This application can also: recognize log file formats automatically, read GZip(gz), Zip and Bzip2(bz2) compressed logs.