Babel
Babel is a compiler for writing next generation JavaScript.
Mathjs
An extensive math library for JavaScript and Node.js
Xdate
A Modern JavaScript Date Library
Bignumber.js
A JavaScript library for arbitrary-precision decimal and non-decimal arithmetic
Tiny Color
Fast, small color manipulation and conversion for JavaScript
jQuery Number
Easily format numbers for display use. Replace numbers inline in a document, or return a formatted number for other uses.
Inversify Js
A powerful and lightweight inversion of control container for JavaScript & Node.js apps powered by TypeScript.
CSS Parent Selector
CSS4 parent selector based on jQuery
Timezone Js
Timezone-enabled JavaScript Date object. Uses Olson zoneinfo files for timezone data.
CSS3 Pie
A behavior for Internet Explorer allowing it to recognize and render various CSS3 box decoration properties
Decimal.js
An arbitrary-precision Decimal type for JavaScript
Placeholder Shiv
Tiny polyfill for the placeholder form element attribute. Requires Prototype.js.
Svgeezy
Allows for automatic Image fallbacks for browsers that can't handle SVGs
Classing Js
Brings the world of classical OOP to javascript
Augment.js
Modern JavaScript in your IE
Css3 Finalize
Tired of adding prefix for each broswer when it comes to the new css3 attributes?
Sugar
A Javascript library for working with native objects.