Decimal.js
An arbitrary-precision Decimal type for JavaScript
Inversify Js
A powerful and lightweight inversion of control container for JavaScript & Node.js apps powered by TypeScript.
String.js
Extra JavaScript string methods.
Bignumber.js
A JavaScript library for arbitrary-precision decimal and non-decimal arithmetic
Datejs
Datejs is an open-source JavaScript Date Library.
Underscore String
String manipulation extensions for Underscore.js javascript library.
Placeholder Shiv
Tiny polyfill for the placeholder form element attribute. Requires Prototype.js.
Sprintf.js
sprintf.js is a complete open source JavaScript sprintf implementation.
Tiny Color
Fast, small color manipulation and conversion for JavaScript
Core Lib
A port of the Ruby 1.9.3 corelib to coffeescript/javascript/node that conforms to rubyspec.org.
Xregexp
Extended JavaScript regular expressions
Css3 Finalize
Tired of adding prefix for each broswer when it comes to the new css3 attributes?
Classing Js
Brings the world of classical OOP to javascript
Ratio.js
Rational numbers for Javascript
Char Funk
a Unicode character utility for JavaScript
Typecast.js
Typecast.js :: Solving the simple problems
CSS3 Pie
A behavior for Internet Explorer allowing it to recognize and render various CSS3 box decoration properties