Mathjs
An extensive math library for JavaScript and Node.js
Bignumber.js
A JavaScript library for arbitrary-precision decimal and non-decimal arithmetic
Xdate
A Modern JavaScript Date Library
Nerdamer
a symbolic math expression evaluator for javascript
Tiny Color
Fast, small color manipulation and conversion for JavaScript
Inversify Js
A powerful and lightweight inversion of control container for JavaScript & Node.js apps powered by TypeScript.
jQuery Number
Easily format numbers for display use. Replace numbers inline in a document, or return a formatted number for other uses.
Decimal.js
An arbitrary-precision Decimal type for JavaScript
Classing Js
Brings the world of classical OOP to javascript
Extract Values
A simple helper to extract values from a string based on a pattern.
Auto Numeric
autoNumeric is a jQuery plugin that automatically formats currency (money) and numbers as you type on form inputs. It supports most International numeric formats and currency signs including those used in Europe, North and South America, Asia and India (lakhs**).
Char Funk
a Unicode character utility for JavaScript
Args.js
Create javascript functions with optional, default, grouped and named parameters.
Ratio.js
Rational numbers for Javascript
Typecast.js
Typecast.js :: Solving the simple problems
Core Lib
A port of the Ruby 1.9.3 corelib to coffeescript/javascript/node that conforms to rubyspec.org.
Datejs
Datejs is an open-source JavaScript Date Library.