Underscore String
String manipulation extensions for Underscore.js javascript library.
Poly
Small, fast, awesome. The only ES5-ish set of polyfills (shims) you can mix-and-match because they're individual AMD modules.
Placeholder Shiv
Tiny polyfill for the placeholder form element attribute. Requires Prototype.js.
Classing Js
Brings the world of classical OOP to javascript
Es6 Shim
ECMAScript 6 (Harmony) compatibility shims for legacy JavaScript engines
Placeholders.js
A JavaScript polyfill for the HTML5 placeholder attribute
Respond
A fast & lightweight polyfill for min/max-width CSS3 Media Queries (for IE 6-8, and more)
String.js
Extra JavaScript string methods.
Typecast.js
Typecast.js :: Solving the simple problems
Extract Values
A simple helper to extract values from a string based on a pattern.
Selectivizr
Selectivizr is a JavaScript utility that emulates CSS3 pseudo-classes and attribute selectors in Internet Explorer 6-8.
Hitch
A lightweight engine that allows you to hitch new capabilities to the browser (prollyfill).
Svgeezy
Allows for automatic Image fallbacks for browsers that can't handle SVGs
Length.js
📏 JavaScript library for length units conversion.
Taggd
A tool to show and add tags to images
Ratio.js
Rational numbers for Javascript
Sugar
A Javascript library for working with native objects.