Mathjs
An extensive math library for JavaScript and Node.js
Xdate
A Modern JavaScript Date Library
Sprintf.js
sprintf.js is a complete open source JavaScript sprintf implementation.
jQuery Number
Easily format numbers for display use. Replace numbers inline in a document, or return a formatted number for other uses.
Big.js
A small, fast JavaScript library for arbitrary-precision decimal arithmetic.
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**).
Timezone Js
Timezone-enabled JavaScript Date object. Uses Olson zoneinfo files for timezone data.
Inversify Js
A powerful and lightweight inversion of control container for JavaScript & Node.js apps powered by TypeScript.
Nerdamer
a symbolic math expression evaluator for javascript
Typecast.js
Typecast.js :: Solving the simple problems
Classing Js
Brings the world of classical OOP to javascript
Char Funk
a Unicode character utility for JavaScript
Tiny Color
Fast, small color manipulation and conversion for JavaScript
Extract Values
A simple helper to extract values from a string based on a pattern.
Bignumber.js
A JavaScript library for arbitrary-precision decimal and non-decimal arithmetic
Taggd
A tool to show and add tags to images
Core Lib
A port of the Ruby 1.9.3 corelib to coffeescript/javascript/node that conforms to rubyspec.org.