Adobe Color CC - https://color.adobe.com/create/color-wheel/
CSS3 Generator: http://css3generator.com
CSS3 Playground: http://css3.mikeplate.com
CSS 3.0 Maker: http://www.css3maker.com
Eric Meyer's CSS Reset: http://meyerweb.com/eric/tools/css/reset/
Ultimate CSS Gradient Generator: http://colorzilla.com/gradient-editor
blog.jquery.com/2013/04/18/jquery-2-0-released
Layer Styles: http://layerstyles.org/builder.html
Lightbox2: http://lokeshdhakar.com/projects/lightbox2/
Prototype JavaScript Framework: http://www.prototypejs.org
Scriptaculous: http://script.aculo.us/
Styling <hr> with CSS: http://www.sovavsiti.cz/css/hr.html
Stylizer*: http://www.skybound.ca
Ultimate CSS Gradient Generator: http://colorzilla.com/gradient-editor
Web-developer’s handbook: http://alvit.de/handbook
Western Civ: http://westciv.com/tools
W3C Markup Validation Service: http://validator.w3.org
Yahoo! Developer Network: http://developer.yahoo.com
YUI Reset CSS: http://yuilibrary.com/yui/docs/cssreset/