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/

Gwstat  
   Graphics add-on for wwwstat reports. May no longer be being supported.
   http://www.sjs.com/cool_stuff/stats/gwstat.html

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://www.hypknowsys.org/

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