Babel
Babel is a compiler for writing next generation JavaScript.
Mathjs
An extensive math library for JavaScript and Node.js
Bignumber.js
A JavaScript library for arbitrary-precision decimal and non-decimal arithmetic
Placeholders.js
A JavaScript polyfill for the HTML5 placeholder attribute
Xdate
A Modern JavaScript Date Library
Nerdamer
a symbolic math expression evaluator for javascript
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.
Selectivizr
Selectivizr is a JavaScript utility that emulates CSS3 pseudo-classes and attribute selectors in Internet Explorer 6-8.
Sugar
A Javascript library for working with native objects.
Decimal.js
An arbitrary-precision Decimal type for JavaScript
Poly
Small, fast, awesome. The only ES5-ish set of polyfills (shims) you can mix-and-match because they're individual AMD modules.
Placeholder Shiv
Tiny polyfill for the placeholder form element attribute. Requires Prototype.js.
Classing Js
Brings the world of classical OOP to javascript
Augment.js
Modern JavaScript in your IE
Extract Values
A simple helper to extract values from a string based on a pattern.