WUM: A Web Utilization Miner
   WUM is a sequence miner. Its primary purpose is to analyze the navigational behaviour of users in a web site, but it is appropriate for sequential pattern discovery in any type of log. It discovers patterns comprised of not necessarily adjacent events and
   http://hypknowsys.sourceforge.net/

Web Analytics Demystified
   Includes free book chapters about web analytics, as well as a blog about web analysis.
   http://www.webanalyticsdemystified.com

Weblog Parse
   Not a log analysis package by itself, rather this is a fast tool for building such packages.
   http://www.acme.com/software/weblog_parse/

WiredMinds
   Software and services company in the area of Web site analytic and the controlling of web-based applications.
   http://www.wiredminds.com/