Here are some useful tools and websites we would like to recommend.
If you want to add to this list just send us an email.
Protect the content of your website with this free tool. Copyscape finds sites that have copied your content without permission.
How does your website compare to your competitor's websites? Use the NeboWeb SEO Scorecard to learn how your website ranks among the major search engines. 
PageRank is a numeric value that represents how important a page is on the web. Google figures that when one page links to another page, it is effectively casting a vote for the other page. The more votes that are cast for a page, the more important the page must be.
Find the owner of any domain name anywhere in the world using the WHOIS protocol. Also find contact information and information about websites & networks.