The HTML Writers Guild Website (organisation for better Websites)
Free Graphics(Excellent set of pointers to free graphics resources)
W3C - The World Wide Web Consortium
The Bare Bones Guide to HTML(the basics)
Free META Tag Analyzer and META Tag Help (make the most of your metatags)
The W3C Markup Validation Servicea free service that checks documents like HTML and XHTML for conformance to W3C Recommendations and other standards.
The Web Design Resource(good dhtml tutorial)
Cascading Style Sheets Tutorial
Cascading Style Sheets