Collection of demos of modern web tech: HTML (aka HTML5), CSS3, WebGL, etc etc.

The web-developer-friendly edition of the HTML5 spec.

html5 information and discussion.

A nice set of default html/css for building html5 sites.

List of html5 related tools - mainly js libraries - that help for detection and addition of html5 features.

A neat fix to allow html5 elements to be stylable in non-HTML5 browsers.

Fix Inserted HTML5 Content with HTML5 innerShiv

A very useful section of Mark Pilgrim's "Dive into HTML5" - how to detect html5 features like canvas, video, etc and serve alternatives to browsers that don't support these features.

Compatibility tables for features in HTML5, CSS3, SVG and other upcoming web technologies

CSS and HTML templates to develop sites suited to iPhone