Yepnope.js
An Asynchronous Conditional Resource Loader
Stringformatter
JS string formatter that supports objects, currency, date/time, decimals, and more supports easy extension and garbage collection ... goes far beyond sprintf approach.
Store
A better way to use localStorage and sessionStorage
Hitch
A lightweight engine that allows you to hitch new capabilities to the browser (prollyfill).
Tiny Color
Fast, small color manipulation and conversion for JavaScript
Moment
Parse, validate, manipulate, and display dates in javascript.
HTML5shiv
This script is the defacto way to enable use of HTML5 sectioning elements in legacy Internet Explorer.
Date
Date() for humans
ES5 Shims
ECMAScript 5 compatibility shims for legacy JavaScript engines
Angled Edges
:triangular_ruler: Quickly create angled section edges using only Sass
Dayjs
⏰ Day.js 2KB immutable date library alternative to Moment.js with the same modern API
Sugar
A Javascript library for working with native objects.
Flexie
Legacy support for the CSS3 Flexible Box Model
Decimal.js
An arbitrary-precision Decimal type for JavaScript
Datejs
Datejs is an open-source JavaScript Date Library.
Underscore String
String manipulation extensions for Underscore.js javascript library.
Console.message
Console messages for cool kids