GridLess
An awesome HTML5 and CSS3 framework for making responsive, cross-browser websites with beautiful typography.
CSS3 Shapes
A collection of geometric shapes you can create using pure CSS3
Animatable
Easy way to create CSS3 animations and ads for Webkit browsers
CSS3 Please
A useful Cross-Browser CSS3 Rule Generator
Initializr
A simple tool to help you getting started with an HTML5 project
Spiderman In CSS3
A wonderful, pure CSS3 animation of Spiderman by Anthony Calzadilla
2010: The Year In Web Standards
Excellent review of the year in which HTML5 and CSS3 broke wide
