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.
Bignumber.js
A JavaScript library for arbitrary-precision decimal and non-decimal arithmetic
String.js
Extra JavaScript string methods.
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
Big.js
A small, fast JavaScript library for arbitrary-precision decimal arithmetic.
Classing Js
Brings the world of classical OOP to javascript
Css3 Finalize
Tired of adding prefix for each broswer when it comes to the new css3 attributes?
Svgeezy
Allows for automatic Image fallbacks for browsers that can't handle SVGs
Ratio.js
Rational numbers 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.
Char Funk
a Unicode character utility for JavaScript