Compatibility tables

• When can I use… - Compatibility tables for support of HTML5, CSS3, SVG and more in desktop and mobile browsers.
• On Mobile I Want to Use - click on features and get displayed how far these techniques are supported on mobile. Uses CanIUse-data!
• The Current State of HTML5 Forms - Browser support for the different features of HTML5 forms
• ECMAScript 5 compatibility table
• CSS3 Click-chart
• HTML5please
• MobileHTML5.org - Which feature is supported from which mobile device?