• ​http://www.w3schools.com/
• ​http://drupal.org/
• ​http://www.alistapart.com/
• ​http://friendlybit.com/
• ​http://www.w3.org/Style/CSS/
• ​http://www.mompswebdesign.com/webtools/csslinkgen.html
• ​http://www.quirksmode.org/js/newmouseover.html
• ​http://meyerweb.com/eric/tools/color-blend/