Very useful Administrator module for Joomla! webmasters should never miss it! It contains 14 validators, 1 user defined validator and site preview. With website validators tool you can easly validate your CSS, HTML, Feed, Links, Section 508, WAI, Speed and size report, Site info, Page Rank, Site Explorer, Site Link, Relate sites, Site Cache, Alexa Rank and Customizable User Defined validator.