HTML

Flexbox30

Learn Flexbox with 30 Code Tidbits ✨

HTML5 Periodical Table

Handy quick reference with summary of the HTML5 elements.

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.

Web Fundamentals

Tutorials, guides, and best practices for building the next generation of web experiences.