Here are some FREE SEO tools that could be really useful to you:
Search Engine Optimization tools
Many good Search Engine Optimization services to aid you in configuring your project for SEO optimization within the different search engines. Search Engine Optimization services will assist you to promote your site, optimize your content and move your search bots place
Pr Prediction Tool
This Google Pagerank prediction tool will forecast your site future Page Rank based on the value and amount of inlinks.
seomoz.org/tools
SEOmoz service includes over twenty Search engine optimization tools formed to help with every aspect of seo, including on-page targeting, website crawlability, rival examination, rank inspection and keyword difficulty
selfseo.com
Search engine optimization tools, net tools, webmaster services, SEO articles.
IP Address Lookup
Domain name Location tool helps you to recognize user’s geographical location.
iwebtool.com
Free web services as well as webmaster services.
Site Comparison
Page Comparison service compares keyphrases, inlinks, bold and emphasis texts, Meta data information etc.
seotoolset.com
Search engine optimization services and certification you want to confidently practice SEO in an increasingly competitive market
feedmyweb.com
optimization services that could aid you optimize your website for search spiders.
Http Header Viewer
Http Response lets you observe the http headers for any specified site.
webuildpages.com/tools
Free SEO services to get a boundary over the competition
URL Redirect Checker
It is extremely important that when a search engine comes to crawl your site it is able to go after any redirects you have set up. URL Redirect Checker helps you validate if the redirect you have formed is Search Spider Friendly.
Similar Content Finder
Similar Content Finder is very helpful tool to find out the duplicate text. Duplicate Content Finder will verify the exact percentage of similarity between any two texts.
Search Engine Crawler Imitator
Search Engine Bot Imitator simulates a search engine by displaying the contents of a page in accurately the manner the search engine spider would see it.
seologs.com/seo-tools.html
Several Search engine optimization services that can aid you to good promote your websites for search bots, and also aid you learn extra about SEO.
Domain Statistics Checker
Domain Statistics Checker accumulate search spider related info about your and your opponents sites.
novelseotools.com
Search engine optimization tools for SEO Marketers.
Domain Age Tool
Domain Age Tool displays estimated age of a website and allows you to examine, how the website looked, when it first started.
tools.seobook.com
Free link examination and keyphrase research tools brought to you by Search engine optimization expert
seochat.com/seo-tools
Search engine optimization services to assist you in configuring your project for seo within the different search spiders.
Back Link analyzer
Backlinks analyzer detects inbound links that point to your site.
Backlinks constructor
Back Links Builder uses search engines to find associated sites for link building during a SEO campaign.
seo-guy.com/seo-tools
Free SEO tools to help with your online optimization efforts.
Reciprocal Link Tester
Reciprocal Link Tester helps you make sure that your link associates are linking back to your site.
Bookmark this link as I will be constantly adding new Search engine optimization tools as I come upon them. If you have any good services to help with SEO then please feel free to leave a comment with the information on this.