Google Website Optimizer

This tool is great to test your site.

Google Analytics is also a very good tool to optimize your site for the search engines.

Keyword Tool

Here is a great Keyword Tool that takes any text input and generates a list of keywords. Common words and duplicates are stripped from the input and the output is in a comma-delimited format. This can be used to generate relevant keywords for Google AdWords or search engine optimization. It is simple, free, and easy to use. This is very convenient.

PageRank

I found this interesting little widget that calculates PageRank on the fly. It say's this page is zero right now, but I look forward to seeing it expand. Here is the widget:



PageRank is calculated on the number of incoming links to your site. A site that has high PageRank can raise other web pages PageRank much more than a site with low PageRank.

PageRank is often referred to as PR in SEO (Search Engine Optimization).

I know that the PageRank calculator offered by BlogFlux is a great example of "Link Bait". People will add the calculator to their site which links back to the BlogFlux website and raises the BlogFlux PR.