Placeholder Shiv
Tiny polyfill for the placeholder form element attribute. Requires Prototype.js.
Classing Js
Brings the world of classical OOP to javascript
Typecast.js
Typecast.js :: Solving the simple problems
Char Funk
a Unicode character utility for JavaScript
Mathjs
An extensive math library for JavaScript and Node.js
Ratio.js
Rational numbers for Javascript
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
CSS3 Pie
A behavior for Internet Explorer allowing it to recognize and render various CSS3 box decoration properties
Taggd
A tool to show and add tags to images
Args.js
Create javascript functions with optional, default, grouped and named parameters.
Css3 Finalize
Tired of adding prefix for each broswer when it comes to the new css3 attributes?
Selectivizr
Selectivizr is a JavaScript utility that emulates CSS3 pseudo-classes and attribute selectors in Internet Explorer 6-8.
Yepnope.js
An Asynchronous Conditional Resource Loader
Length.js
📏 JavaScript library for length units conversion.
Hitch
A lightweight engine that allows you to hitch new capabilities to the browser (prollyfill).
Numeral
A javascript library for formatting and manipulating numbers.