CSS3

• CSS3 please, for testing CSS styles and effects (link)
• CSS3 Introduction (link)
• Cubic Bezier Timing Function (link)
• Using CSS3 Transitions, Transforms and Animation (link)

Columns

• Multi-column layout, at CSS3 Info (link)
• For older browsers, Columnizer (link) jQuery plugin performs the same functionality.

Fonts

• Google Web Fonts (link)
• Open Font Library (link)

Other

• Responsive Web Design (link)