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