OPTIMIZATION TOOLS

ON BACKLINKS
A good tool is http://www.searchengineworld.com/cgi-bin/sim_spider.cgi

Another good tool is http://www.marketleap.com/publinkpop

http://www.link-vault.com is a good tool and excellent for massive backlink campaigns.
Another is h-ref>com. As at the time of writing they had 2500 Links available> And it is not a link farm.

Another resource is http://www.bannershift.com/ This network has a search engine where you can type your keywords in their search box. It gives you relevant pages on the basis of your keywords where to place your links.

Another good tool though not an online one is the Arelis Link Management software is really good at finding sites for link exchange

WEBCEO software is a FREE great tool for ranking, backlinks, optimzation with certification training. http://www.webceo.com/cgi-bin/go/clickthru.cgi?id=SAMMYIFE

Another free good tool you have to install on your server is Carver's LInk managemen assistant.

http://www.digitalpoint.com/tools/ is a great tool and one of my favorites for keyword suggestion.

Another site is
http://www.socengine.com/seo/tools.php

http://www.urltrends.com is a good site for a complete overview of your web presence.

An easy PR check tool you can cut and paste lists into quickly is
http://www.thinkbling.com/prcheck/