HTML
http://www.w3.org/TR/html401/
This specification defines the HyperText Markup Language (HTML), the publishing language of the World Wide Web.
http://www.htmlhelp.com/
The Web Design Group was founded to promote the creation of non-browser specific, non-resolution specific, creative and informative sites that are accessible to all users worldwide.
http://www.hwg.org/
The Guild is the first and largest international association of web site design and web master developers. Membership is open to anyone with an interest in learning more about or advancing their skills in web site design and development.
http://www.htmlgoodies.com/
Free html tutorials and help, images, color codes and more for the web developer. Featuring tutorials on HTML tags, programming, basics, JavaScript, frames, hex codes and more. Our weekly newsletter provides the latest information for developers.
http://www.softpress.com/
Freeway 4 Pro is the next generation of Web design software. Think visually, and code like a geek -- without having to write HTML yourself.