Xdate
A Modern JavaScript Date Library
CSS3 Pie
A behavior for Internet Explorer allowing it to recognize and render various CSS3 box decoration properties
Underscore String
String manipulation extensions for Underscore.js javascript library.
Moment
Parse, validate, manipulate, and display dates in javascript.
Length.js
📏 JavaScript library for length units conversion.
Placeholders.js
A JavaScript polyfill for the HTML5 placeholder attribute
Args.js
Create javascript functions with optional, default, grouped and named parameters.
Klass
a utility for creating expressive classes in JavaScript
Stringformatter
JS string formatter that supports objects, currency, date/time, decimals, and more supports easy extension and garbage collection ... goes far beyond sprintf approach.
HTML5shiv
This script is the defacto way to enable use of HTML5 sectioning elements in legacy Internet Explorer.
Css3 Finalize
Tired of adding prefix for each broswer when it comes to the new css3 attributes?
Yepnope.js
An Asynchronous Conditional Resource Loader
Xregexp
Extended JavaScript regular expressions
Object.observe
Object.observe polyfill/shim trying to be compliant
Angled Edges
:triangular_ruler: Quickly create angled section edges using only Sass
Console.message
Console messages for cool kids
ES5 Shims
ECMAScript 5 compatibility shims for legacy JavaScript engines