This free SEO keyword tool for search engine optimization is the Topword Tool
Search Engine Optimization Links
You need to submit to directories to get better rankings and none is a better boost than submitting to DMOZ.
You need to see what the search engine spiders see in order to do the best search engine optimizing possible. Use this free Search Engine Spider Simulator.
Want to know how the search engines relate information to and from each other? This Search Engine Relationship Chart shows you how they all work together - and in some cases don't.
Site Map Tool
Build Html and XML site maps with the current new standards for Google and Yahoo.
Check your google search rankings against your keywords up to 1,000 results deep on the Google Rankings Tool.