Hitch
A lightweight engine that allows you to hitch new capabilities to the browser (prollyfill).
CSS3 Pie
A behavior for Internet Explorer allowing it to recognize and render various CSS3 box decoration properties
Object.observe
Object.observe polyfill/shim trying to be compliant
Augment.js
Modern JavaScript in your IE
Svgeezy
Allows for automatic Image fallbacks for browsers that can't handle SVGs
CSS Parent Selector
CSS4 parent selector based on jQuery
Klass
a utility for creating expressive classes in JavaScript
Dayjs
⏰ Day.js 2KB immutable date library alternative to Moment.js with the same modern API
Extract Values
A simple helper to extract values from a string based on a pattern.
Es6 Shim
ECMAScript 6 (Harmony) compatibility shims for legacy JavaScript engines
Nerdamer
a symbolic math expression evaluator for javascript
Length.js
📏 JavaScript library for length units conversion.
Numeral
A javascript library for formatting and manipulating numbers.
Respond
A fast & lightweight polyfill for min/max-width CSS3 Media Queries (for IE 6-8, and more)
Placeholders.js
A JavaScript polyfill for the HTML5 placeholder attribute
Args.js
Create javascript functions with optional, default, grouped and named parameters.
HTML5shiv
This script is the defacto way to enable use of HTML5 sectioning elements in legacy Internet Explorer.