- Respond 10,321 A fast & lightweight polyfill for min/max-width CSS3 Media Queries (for IE 6-8, and more)
- picturefill 8,549 A responsive image polyfill for <picture>, srcset, sizes, and more
- Device-Bugs 794 Just a collection of quirks and issues that occur on browser platforms (particularly those unlikely to update)
- iOS-Orientationchange-Fix 789 A fix for the iOS orientationchange zoom bug.
- eCSSential 413 An experiment in optimized loading of mobile-first responsive CSS.