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