Webmonkey: the web developer's resource
A useful resource for designers and programmers. Includes guides on
HTML, javascript, DHTML and XML, Perl, Java, ColdFusion etc. Also has
information on audio, animation, Flash and video. Includes quick
reference tutorials.
Builder.Com
The Web Design section in this site contains a lot of information on
site design and authoring, programming code, graphics and multimedia
and back-end/site management issues.
HTML Writers' Guild
The Resources section in this site contains Resource section where you
will find lots of info on design and scripting and also links to other
useful sites.
W3C World Wide Web Consortium Vast resource containing specifications and guidelines for developing web site/applications.