Browsers
New versions of the most popular browsers
can be downloaded from the sites below - free.

Firefox

HTML

W3C's home page for HTML.
http://www.w3.org/MarkUp/

The HTML Writers Guild is the world's largest international organization of Web authors.
http://www.hwg.org/

CNET Builders.com a site with general site building information.
http://www.builder.com

CNET Builders.com Developer Library
http://builder.cnet.com/webbuilding/0-7650.html

CSS

Eric Meyer's site - a great resource for information about CSS.
http://www.meyerweb.com/eric/css/

Buy the book from Amazon
Cascading Style Sheets: The Definitive Guide, 2nd Edition

CSS Zen Garden
http://www.csszengarden.com/

Other Links

The Surfing Detective Mystery Series - by Chip Hughes
http://surfingdetective.com