Es6 Shim
ECMAScript 6 (Harmony) compatibility shims for legacy JavaScript engines
Nerdamer
a symbolic math expression evaluator for javascript
Placeholder Shiv
Tiny polyfill for the placeholder form element attribute. Requires Prototype.js.
Classing Js
Brings the world of classical OOP to javascript
Char Funk
a Unicode character utility for JavaScript
Taggd
A tool to show and add tags to images
Object.observe
Object.observe polyfill/shim trying to be compliant
Core Lib
A port of the Ruby 1.9.3 corelib to coffeescript/javascript/node that conforms to rubyspec.org.
Mathjs
An extensive math library for JavaScript and Node.js
Ratio.js
Rational numbers for Javascript
Args.js
Create javascript functions with optional, default, grouped and named parameters.
Selectivizr
Selectivizr is a JavaScript utility that emulates CSS3 pseudo-classes and attribute selectors in Internet Explorer 6-8.
Css3 Finalize
Tired of adding prefix for each broswer when it comes to the new css3 attributes?
CSS3 Pie
A behavior for Internet Explorer allowing it to recognize and render various CSS3 box decoration properties
Length.js
📏 JavaScript library for length units conversion.
Tiny Color
Fast, small color manipulation and conversion for JavaScript
Numeral
A javascript library for formatting and manipulating numbers.