Here are some web design resources that some might find useful. The list be kept as concise as possible–recommendations are welcome.

Front-end stuff:

• HTML Reference: http://reference.sitepoint.com/html
• CSS Reference: http://reference.sitepoint.com/css
• HTML Validation: http://validator.w3.org/
• CSS Validation: http://jigsaw.w3.org/css-validator/
• CSS Grid Framework: http://960.gs/
• JavaScript Reference: https://developer.mozilla.org/en/JavaScript/Reference
• jQuery Docs: http://docs.jquery.com/Main_Page
• jQuery Touch: http://jqtouch.com/
• MInify JavaScript: http://www.minifyjavascript.com/
• Browsercam: http://www.browsercam.com/

Back-end stuff

• PHP: http://php.net
• MySQL: http://dev.mysql.com/doc/
• CodeIgniter: http://codeigniter.com/
• Yii Framework: http://www.yiiframework.com/
• Easy Development Setup: http://www.mamp.info
• Ruby on Rails: http://rubyonrails.org/
• ExpressionEngine: http://expressionengine.com/
• MojoMotor: http://mojomotor.com/

Blogs to read

• A List Apart: http://www.alistapart.com/
• Smashing Magazine: http://www.smashingmagazine.com/