Length.js
📏 JavaScript library for length units conversion.
Underscore String
String manipulation extensions for Underscore.js javascript library.
ES5 Shims
ECMAScript 5 compatibility shims for legacy JavaScript engines
Big.js
A small, fast JavaScript library for arbitrary-precision decimal arithmetic.
Stringformatter
JS string formatter that supports objects, currency, date/time, decimals, and more supports easy extension and garbage collection ... goes far beyond sprintf approach.
Dayjs
⏰ Day.js 2KB immutable date library alternative to Moment.js with the same modern API
Taggd
A tool to show and add tags to images
Date
Date() for humans
Klass
a utility for creating expressive classes in JavaScript
Store
A better way to use localStorage and sessionStorage
Hitch
A lightweight engine that allows you to hitch new capabilities to the browser (prollyfill).
Yepnope.js
An Asynchronous Conditional Resource Loader
Sprintf.js
sprintf.js is a complete open source JavaScript sprintf implementation.
Moment
Parse, validate, manipulate, and display dates in javascript.
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**).
Flexie
Legacy support for the CSS3 Flexible Box Model
Respond
A fast & lightweight polyfill for min/max-width CSS3 Media Queries (for IE 6-8, and more)