Char Funk
a Unicode character utility for JavaScript
Xregexp
Extended JavaScript regular expressions
Core Lib
A port of the Ruby 1.9.3 corelib to coffeescript/javascript/node that conforms to rubyspec.org.
Object.observe
Object.observe polyfill/shim trying to be compliant
Hitch
A lightweight engine that allows you to hitch new capabilities to the browser (prollyfill).
Big.js
A small, fast JavaScript library for arbitrary-precision decimal arithmetic.
Ratio.js
Rational numbers for Javascript
Placeholders.js
A JavaScript polyfill for the HTML5 placeholder attribute
Numeral
A javascript library for formatting and manipulating numbers.
Es6 Shim
ECMAScript 6 (Harmony) compatibility shims for legacy JavaScript engines
Selectivizr
Selectivizr is a JavaScript utility that emulates CSS3 pseudo-classes and attribute selectors in Internet Explorer 6-8.
HTML5shiv
This script is the defacto way to enable use of HTML5 sectioning elements in legacy Internet Explorer.
Xdate
A Modern JavaScript Date Library
Svgeezy
Allows for automatic Image fallbacks for browsers that can't handle SVGs
Inversify Js
A powerful and lightweight inversion of control container for JavaScript & Node.js apps powered by TypeScript.
String.js
Extra JavaScript string methods.
CSS Parent Selector
CSS4 parent selector based on jQuery