[url=http://www.w3.org/QA/2002/04/valid-dtd-list.html]The W3C List of Recommended Doctypes[/url] - Remember to use a doctype! [url=http://www.w3.org/QA/Tools/]The W3C QA Toolbox (Validators, checkers and other tools)[/url] - Remember to check your code! [url=http://www.accessibility101.org.uk/free-website-accessibility-tests.htm]Free Website Accessibility Tests[/url] - Becoming very important for legal reasons and ensuring that as many people as possible can use your amazing website. [url=http://gridlayouts.com/]Grid Layout Javascript[/url] - Really great piece of useful javascript to use during design/development for people employing a Grid Layout. [url=http://www.cssplay.co.uk/index]CSS Play[/url] - Website with lots of examples of multi-column layouts, css menus (drop-down, in-line, etc), image maps, etc.