Validate website design - Tools & Testing

HTML	W3C HTML home page	Dave Raggett's introduction to HTML
		More advanced features
CSS	W3C Cascading Style Sheets	Introduction to CSS
Accessibility	W3C Web Content Accessibility Guidelines 1.0
Website testing	check HTML and XHTML for conformance	check Cascading Style Sheets (CSS)
	broken link checker	Lynx Viewer - text web browser
	Google views	Screenshots in different browsers
	domain DNS report	website speed test
	Text analysis	keyword density and prominence
	meta tag analysis	robot.txt validate
	Google Toolbar PageRank, cached page, search highlight and backward links	Internet Explorer Developer Toolbar Validate HTML, CSS, WAI, and RSS links. View in different browser window sizes
Keyword	Google Adwords: Keyword Tool
Design tools	Content management
	Colour contrast and dimension	4096 Color Wheel
	The colour wizard	Clip art and images
	Create favicon.ico	Golden ratio
Internet Archive	Wayback Machine

W3C HTML 4.01

W3C CSS