This is a pretty old page, containing little, so far, since the dawn of HTML5.
The WDVL/ Tutorials - Introductory material on most topics listed on this page.
“was founded to promote the creation of non-browser specific, non-resolution specific, creative and informative sites that are accessible to all users worldwide. To this end, the WDG offers material on a wide range of HTML related topics. We hope that with this site as a reference, you will be able to create Web sites that can be used by every person on the Internet, regardless of browser, platform, or settings.”
A Guide to Web Authentication Alternatives by Jan Wolter: a detailed and thoughtful introduction to the subject.
moreCrayons: description and nifty demonstration of a 4,096 color "web-smart" palette.
“It will show you how to use W3C's Cascading Style Sheets language (CSS) as well as alternatives using HTML itself. The route will steer you clear of most of the problems caused by differerences between different brands and versions of browsers.”
A bird’s-eye view of the CSS landscape.
“Agitprop”: good discussions and demonstrations of various font and style sheet issues.
TtH translates the equations, instead of converting them to images. But see this related comment.
Open Source Content Management System List. Last updated in August 2004, but still of interest.
“Good URLs should have a form like /products/cars/bmw/z8 or /articles/january.htm and not something like index.php?id=12.”