WP Viral Traffic DEMO has been released. WPVT is a WordPress Plugin - Read here for more details and full version: http://cleverplugins.com/wordpress-plugins/wp-viral-traffic

LinkDiagnosis.com is an online website diagnosis, and it is very easy to use and well designed. The tool is perfect for running quick analysis of websites, as compared to the more robust offline tools I use for detailed SEO analysis.