Mathjs
An extensive math library for JavaScript and Node.js
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**).
Tiny Color
Fast, small color manipulation and conversion for JavaScript
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.
Datejs
Datejs is an open-source JavaScript Date Library.
Big.js
A small, fast JavaScript library for arbitrary-precision decimal arithmetic.
Bignumber.js
A JavaScript library for arbitrary-precision decimal and non-decimal arithmetic
Taggd
A tool to show and add tags to images
Args.js
Create javascript functions with optional, default, grouped and named parameters.
Sprintf.js
sprintf.js is a complete open source JavaScript sprintf implementation.
Char Funk
a Unicode character utility for JavaScript
Ratio.js
Rational numbers for Javascript
Klass
a utility for creating expressive classes in JavaScript
Timezone Js
Timezone-enabled JavaScript Date object. Uses Olson zoneinfo files for timezone data.
Date
Date() for humans
Numeral
A javascript library for formatting and manipulating numbers.