Resources, Recommendations,
& Places of Interest

World Wide Web Consortium (W3C)

• W3C
• W3Schools - Home
• W3Schools - XHTML
• W3Schools - CSS
• W3C Code Validator

This is truly the only place to get definitive answers on what the standards are. The W3C is the governing body that creates the standards.

Browsers

• Mozilla Firefox
• Safari
• Opera
• Internet Explorer
• IEs For OSX
• IEs For Linux

Add-ons

• Firebug - Firefox
• Aardvark - Firefox
• MeasureIt - Firefox
• Colorzilla - Firefox
• XRAY - Safari/Webkit, IE, Firefox
• MRI - Safari/Webkit, IE, Firefox
• Developers Toolbar - IE

Editors

• Texmate - OSX
• Textmate Manual
• Emacs
• Emacs Manual

Some other cool places to check out.

• A List Apart - Great articles about standards based design.
• CSS Zen Garden - The ultimate site for CSS examples.
• Ajaxian - Great coverage of the everchanging world of AJAX/Javascript.
• The Web Standards Project - (WaSP)