CSS-Element-Queries Polyfill. proof-of-concept for high-speed element dimension/media queries in valid css.
A responsive image polyfill for <picture>, srcset, sizes, and more
The Angular 2 Polyfill
A fast & lightweight polyfill for min/max-width CSS3 Media Queries (for IE 6-8, and more)
IndexedDB polyfill (via Web SQL Database)
A responsive image polyfill for <picture>, srcset, sizes, and more
Polyfill to remove click delays on browsers with touch UIs
A polyfill to make SVG sprites right on some browsers