NCSA--A Beginner's Guide to HTML
Downloadable primer with links to additional Web-based resources.

HTML Goodies
Free html tutorials from industry experts. Featuring extensive tutorials on tags, programming, basics, script, frames and more.

The Web Design Group
The WDG offers material on a wide range of HTML related topics.

HTML Help Central
This site hosts an award winning easy to understand guide to HTML and building your own web site.

The World Wide Web Consortium
W3C develops interoperable technologies (specifications, guidelines, software, and tools) to lead the Web to its full potential as a forum for information, commerce, communication, and collective understanding. Extremely technical.