The following are the various articles that have been filed and posted under the category of Software that can be found here at Musings From Us, for your enjoyment.
CSE HTML Validator is the only validator that I personally use. I have been using it since 1997 when it was first released. Back then it was one of the very few complient validators for HTML standards and it would catch just about any error that you might put in your code. It even integrates with HomeSite (if you all still use that one), Dreamweaver, TopStyle and can even be used as a CSS/HTML editor all on its own. I find it even better then any validations done by the standards authority for CSS and HTML.