16. Keyworddensity.com
Free, fast keyword density tool for search engine optimizers. Compare any two web pages on the internet.
http://www.keyworddensity.com

17. Ranks.nl Tools Spider Page
Keyword Density Analyzer, and Keyword Placement & Prominence analysis.
http://www.ranks.nl/tools/spider.html

18. Wordze.com
Our keyword tools will not only show you what keywords are being searched for, you will also gain access to tools that will allow you to track keywords beyond their estimated daily search volume.
http://www.wordze.com

19. Adlab.msn.com Forecastv2 Page
The information, tools, and results shown here are based on a sampling of real data and are provided to demonstrate only a proof of concept. They may not be in production yet and are designed to produce anecdotal or generalized information.
http://adlab.msn.com/ForecastV2

20. Keyworddiscovery.com Search Page
A free search term suggestion and keyword research tool to offer a more reliable alternative to the original Overture suggestion tool.
http://www.keyworddiscovery.com/search.html

21. Tools.seobook.com Keyword-tools Seobook Page
Learn which keywords you should be targeting to increase your website rankings, traffic, and profit.
http://tools.seobook.com/keyword-tools/seobook

22. Tools.seobook.com Firefox Seo-for-firefox Page
SEO for Firefox is a free Firefox extension which adds many search engine optimization data points into Google's SERPs and Yahoo!'s SERPs on the fly.
http://tools.seobook.com/firefox/seo-for-firefox.~

23. Seocentro.com Search-engines Link-popularity Page
Online Link Popularity check tool to check Backlinks to your site.
http://www.seocentro.com/tools/search-engines/lin~

24. Searchbliss.com Seo-tools Popularity Page
Check your website's link popularity in the major search engines using this free web tool. Link popularity is one of the best ways to check overall website visibility and online presence.
http://www.searchbliss.com/seo-tools/popularity.a~

25. Soloseo.com Tools Indexrank Page
Check your IndexRank with the IndexRank SEO Tool.
http://www.soloseo.com/tools/indexRank.html

26. Seoscorecard.com
Check your website's search engine rankings versus your competition's. Compare the search engine results for the keywords that drive traffic across to your website.
http://www.seoscorecard.com

27. Tools.seobook.com General Linkpop Page
Tool to help you compare the link popularity scores between different websites.
http://tools.seobook.com/general/linkpop

28. Tools.seobook.com General Website-comparison Page
Tool compares the page titles, meta information, and common keyword phrases between different phrases.
http://tools.seobook.com/general/website-comparis~

29. Tools.seobook.com Competition-finder Index Page
Free Competition Finder SEO Tool by Aaron Wall of SeoBook.com
http://tools.seobook.com/competition-finder/index~

30. Tools.seobook.com General Sesat Page
Tool that shows you how many pages you have indexed compared to competing sites.
http://tools.seobook.com/general/sesat