Validator S.A.C. Updated at September 7, 2009 By Chuck Houpt Stand-alone version of the W3C’s HTML / XHTML Markup Validator
ClearLisp Updated at May 8, 2008 By Jan Tolenaar ClearLisp is a Common Lisp interpreter written in C# with a large library including all of .NET and an extensive object model.
XhtmlValidator.php Updated at August 28, 2006 By Bermi Ferrer XhtmlValidator can be used to validate XHTML documents.