HTML

HTML Cheat Sheet

Interactive HTML cheat sheet for beginners. All HTML elements with descriptions, attributes, code examples & live previews

HTML5 Weekly

A once–weekly HTML5 and Web Platform technology roundup. CSS 3, Canvas, WebSockets, WebGL, Native Client, and more.

Modernizr

The feature detection library for HTML5/CSS3

Can I use

Provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.

Codrops

Web design and development blog that publishes articles and tutorials about the latest web trends, techniques and new possibilities.

HTML5 Rocks

A resource for open web HTML5 developers