Add this CSS class to your markup to highlight any tags that are missing or wrong. Nifty stuff!
http://www.red-root.com/sandbox/holmes/
http://24ways.org/2009/make-your-mockup-in-markup
http://www.colorcombos.com/
http://drewish.com/tools/vertical-rhythm
http://www.adobe.com/devnet/dreamweaver/articles/drupal_zen_subthemes.ht...
http://www.jeremymartin.name/projects.php?project=kwicks
http://teddy.fr/blog/theming-almost-hidden
http://fluid.newgoldleaf.com/
http://teddy.fr/blog/beautify-your-drupal-forms
http://www.topnotchthemes.com/blog/081204/horizontal-user-login-block-us...
This site is a test bed for aggregation. It pulls from quite a few places:
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