Free SEO Tools

WordTracker.com
WordTracker is a useful tool for determining the right Internet marketing keywords for your search engine placement and ranking campaign. Shows the top 50 search terms for various search engine voyeurs and metacrawlers for the past 24 hours. This information is updated daily.

Inventory.overture.com
Overture’s Search Term Suggestion Tool

Zünch Spider Sim
Powerful Search Engine Spider Simulator - Shows you how your site appears to search engines.

Search Engine Decoder
Search-this.com - search engine optimization (SEO) articles and website marketing advice, tips, information on web site promotion, search engine positioning, and website ranking.