The HTML5 Shiv : The HTML5 Shiv enables use of HTML5 sectioning elements in legacy Internet Explorer and provides basic HTML5 styling for Internet Explorer 6-9, Safari...
Selectivizr : CSS3 pseudo-class and attribute selectors for IE 6-8
fetch polyfill : The global fetch function is an easier way to make web requests and handle responses than using an XMLHttpRequest. This polyfill is written as closely...
Shumway : Shumway is an HTML5 technology experiment that explores building a faithful and efficient renderer for the SWF file format without native code assista...
LokiJS : A fast, in-memory document-oriented datastore for node.js, browser and cordova
IE7.js is a JavaScript library to make Microsoft Internet Explorer behave like a standards-compliant browser. It fixes many HTML and CSS issues and makes transparent PNG work correctly under IE5 and IE6.