Xdate
A Modern JavaScript Date Library
Mathjs
An extensive math library for JavaScript and Node.js
Babel
Babel is a compiler for writing next generation JavaScript.
Sprintf.js
sprintf.js is a complete open source JavaScript sprintf implementation.
Placeholders.js
A JavaScript polyfill for the HTML5 placeholder attribute
jQuery Number
Easily format numbers for display use. Replace numbers inline in a document, or return a formatted number for other uses.
Poly
Small, fast, awesome. The only ES5-ish set of polyfills (shims) you can mix-and-match because they're individual AMD modules.
Auto Numeric
autoNumeric is a jQuery plugin that automatically formats currency (money) and numbers as you type on form inputs. It supports most International numeric formats and currency signs including those used in Europe, North and South America, Asia and India (lakhs**).
Extract Values
A simple helper to extract values from a string based on a pattern.
Timezone Js
Timezone-enabled JavaScript Date object. Uses Olson zoneinfo files for timezone data.
Klass
a utility for creating expressive classes in JavaScript
Augment.js
Modern JavaScript in your IE
Es6 Shim
ECMAScript 6 (Harmony) compatibility shims for legacy JavaScript engines
Ratio.js
Rational numbers for Javascript
Svgeezy
Allows for automatic Image fallbacks for browsers that can't handle SVGs
Nerdamer
a symbolic math expression evaluator for javascript
CSS Parent Selector
CSS4 parent selector based on jQuery