css-tricks http://css-tricks.com/2833-the-css-overflow-property/
Borwser Support http://www.webdevout.net/browser-support-css
TypeTester http://www.typetester.org/
ColourLovers http://www.colourlovers.com/
WebFonts http://www.google.com/webfonts
CSS Buttons http://www.cssbuttongenerator.com/
CSS Validation http://jigsaw.w3.org/css-validator/