web analytics site and tools

Recently,reading and research some web analytics tools,just make a list here.

free
http://analog.cx
http://www.awstats.org
http://clicktracks.com
http://www.google.com/analytics
http://onestatfree.com
http://www.crazyegg.com

low cost
http://unica.com
http://clicktracks.com
http://visistat.com
http://nextstat.com
http://www.indextools.com
http://www.websidestory.com
http://www.metriserve.com
http://www.ecommstats.com

enterprise tools
http://www.webtrends.com
http://www.omniture.com
http://www.coremetrics.com