aight2.1.1un-suck JavaScript APIs in IE8 & 9
css3pie2.0beta1CSS3 PIE JavaScript edition. Enables rendering of common CSS3 decoration properties in Internet Explorer 6-9.
flexibility2.0.1Use Flexbox while supporting older Internet Explorers
html5shiv3.7.3html5shiv is an HTML5 JavaScript shim for IE to recognise and style the HTML5 elements
ieBetter.js1.0.3make ie browser like a morden browser main for ie6~ie8
selectivizr1.0.2selectivizr is a JavaScript utility that emulates CSS3 pseudo-classes and attribute selectors in Internet Explorer 6-8. Simply include the script in your pages and selectivizr will do the rest.
css-vars-ponyfill2.4.8Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers
webcomponents-template-polyfill1.5.1HTML template element polyfill.