W3C specs
CSS
- Learn more about the CSS3 NOT selector
- Using Unprefixed CSS3 Gradients in Modern Browsers
- CSS3 Regions and Flow
- Nice Sparkle Progress Bars
- CSS3 Checkboxes and Radiobuttons GFACE Style | GFACE Developer Blog
HTML
- Display Form [progress]
- HTML5 Forms Input Types: Date, Color and Range
- Examples Of Using New HTML5 Attributes
- Getting to Grips with the HTML5 File API
- When Will We See the Final Version of HTML5?
- Constraint Validation: Native Client Side Validation for Web Forms – HTML5 Rocks
Responsive
- Stop designing for fixed viewports!
- Responsive-content
- Readlist – Responsive Enhancement
- Device screen resolutions ordered by OS
- Does Google really prefer responsive sites?
- Seven
- 5 iPad Mini Web Design and Development Early Best Practices
- Adaptive and Fluid Approach in Responsive Web Design
- Responsive CSS Framework Comparison: Bootstrap, Foundation, Skeleton