- HTML5 Spec for Web Developers
- caniuse -- Compatibility tables for support of HTML5, CSS3, SVG and more in desktop and mobile browsers.
- validator -- HTML5 validation.
- QuirksMode -- Fixes specific for browsers
- Google Web fonts
- FontSquirrel -- Font resource
- http://html5boilerplate.com/
- Reset Stylesheet -- http://meyerweb.com/eric/tools/css/reset/ modified for HTML5 http://html5doctor.com/html-5-reset-stylesheet/
- http://necolas.github.com/normalize.css/
- http://960.gs/
- http://www.blueprintcss.org/
- http://cssgrid.net/
- http://en.wikipedia.org/wiki/Responsive_Web_Design
- http://twitter.github.com/bootstrap/
- Modernizr -- Library for programmatically detecting availability of a specific HTML5 feature in the current browser.
- geo.js, a geolocation API wrapper
- http://camendesign.com/code/video_for_everybody -- Helps selecting suitable video format for the current browser.
- https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-browser-Polyfills -- fallbacks in case of a particular feature of HTML5 is not supported in the browser. Helps preparing web apps future ready.