Rankopia is a free Website Ranking Report tool which will collect a number of details about your site or domain. It can collect Pagerank, Alexa Rank, Indexed Pages, Validation Errors, Traffic and On Site SEO information but to name a few.

Just enter a domain in the box above, hit go and you will be taken to the information page, you can also update your sites info by hitting the "Update Now" button which is visable on the information page.