WooRank is primarily an SEO tool similar to Website Grader which is used to analyze a website for potential improvements. WooRank | Website analysis tool.

Excellent SEO article that reads like a step-by-step guide. Almost everything related to SEO is covered and backed by research and data. At the end is a chart showing the weighted components of a site that Google takes into account when determining rank. A great read, lots of good info here: SEOmoz | Perfecting Keyword [...]