FastCDN

FastCDN is a high-speed and globally available content distribution network for the most popular, open-source libraries.

6px

A completely Javascript framework agnostic SDK for the 6px (https://6px.io) API. Includes essential methods to run requests over to 6px along with some convenience methods (dropzone, etc).

github.com/6px-io/6px-js

16pixels

16pixels is a set of CSS rules to ensure consistent 16 pixels based typography. No dependencies. Pixels are used for font sizes and line heights, as well as for paddings and margins. Wrap your HTML content with class .col and you are done.

englishextra.github.io/libs/16pixels/

AniJS

A Library to Raise your Web Design without Coding

anijs.github.io

Animate.css

Just-add-water CSS animation - Animate.css is a bunch of cool, fun, and cross-browser animations for you to use in your projects. Great for emphasis, home pages, sliders, and general just-add-water-awesomeness.

daneden.github.io/animate.css/

Backbone.js

Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface.

backbonejs.org

Bootstrap

Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web.

getbootstrap.com

Buttons

Buttons is a highly customizable production ready mobile web and desktop css button library. Buttons is free and open source.

unicorn-ui.com/buttons/

Chart.js

Simple, clean and engaging charts for designers and developers.

chartjs.org

Cookies.js

Cookies.js is a small client-side javascript library that makes managing cookies easy.

github.com/ScottHamper/Cookies

D3.js

D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS. D3’s emphasis on web standards gives you the full capabilities of modern browsers without tying yourself to a proprietary framework, combining powerful visualization components and a data-driven approach to DOM manipulation.

d3js.org

Dojo

A JavaScript toolkit that saves you time and scales with your development process. Provides everything you need to build a Web app. Language utilities, UI components, and more, all in one place, designed to work together perfectly.

dojotoolkit.org

Ember.js

Ember.js is a JavaScript framework for creating ambitious web applications.

emberjs.com

FileSaver.js

FileSaver.js implements the HTML5 W3C saveAs() FileSaver interface in browsers that do not natively support it. FileSaver.js is the solution to saving files on the client-side, and is perfect for webapps that need to generate files, or for saving sensitive information that shouldn't be sent to an external server.

github.com/eligrey/FileSaver.js/

FitText

FitText.js, a jQuery plugin for inflating web type. FitText makes font-sizes flexible. Use this plugin on your responsive design for ratio-based resizing of your headlines.

fittextjs.com

FlipDiv

FlipDiv is a space effecient 3D menu with CSS transitions. FlipDiv works best in browsers with support for CSS 3D transforms, although it falls back on 2D animation for older browsers. It also supports touch events for mobile devices.

github.com/kireerik/FlipDiv/

FlowType.JS

Responsive web typography at its finest: font-size based on element width.

simplefocus.com/flowtype/

Font Awesome

Font Awesome gives you scalable vector icons that can instantly be customized — size, color, drop shadow, and anything that can be done with the power of CSS.

fortawesome.github.io

Fort.js

Modern progress bar for form completion. All you do is add the form and Fort.js' algorithm will take care of the rest. Best of all, it's super small.

github.com/idriskhenchil/Fort.js

FuncUnit

FuncUnit enhances assertion libraries like QUnit and Jasmine, enabling them to simulate user actions, easily test asynchronous behavior, and support black box testing. Use its terse jQuery-like syntax to superpower your functional or unit tests.

funcunit.com

Glide.js

Glide is responsive and touch-friendly jQuery slider. Based on CSS3 transitions. It's simple, lightweight and fast. Designed to slide, no less, no more.

github.com/jedrzejchalubek/Glide.js

HTML5 Shiv

This script is the defacto way to enable use of HTML5 sectioning elements in legacy Internet Explorer.

github.com/afarkas/html5shiv

ICanHaz.js

ICanHaz.js is a clean solution for templating with Mustache.js and jQuery or Zepto.

github.com/HenrikJoreteg/ICanHaz.js

jQuery

jQuery is a fast, small, and feature-rich JavaScript library. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers. With a combination of versatility and extensibility, jQuery has changed the way that millions of people write JavaScript.

jquery.com

JQuery-Snowfall

Makes it snow on any web page or specific element.

github.com/loktar00/JQuery-Snowfall

Kalendae

Kalendae is an attempt to do something that nobody has yet been able to do: make a date picker that doesn't suck.

github.com/ChiperSoft/Kalendae

KaTeX

KaTeX is the fastest math typesetting library for the web.

khan.github.io/KaTeX/

Leaflet.awesome-markers

Colorful, iconic & retina-proof markers for Leaflet, based on the Font Awesome/Twitter Bootstrap icons.

github.com/lvoogdt/Leaflet.awesome-markers

Lightbox

The original lightbox script.

lokeshdhakar.com/projects/lightbox2

LoadGo

LoadGo is a JQuery plugin that allows you to create a progress bar by using your own images.

franverona.com/loadgo/

ModelCore

ModelCore is a JavScript ORM / Active Record to work with angularjs and others. Easy to use and to understand.

github.com/klederson/ModelCore/

MooTools

MooTools is a compact, modular, Object-Oriented JavaScript framework designed for the intermediate to advanced JavaScript developer. It allows you to write powerful, flexible, and cross-browser code with its elegant, well documented, and coherent API.

mootools.net

Papa Parse

The powerful, in-browser CSV parser for big boys and girls.

papaparse.com

Prototype

Prototype takes the complexity out of client-side web programming. Built to solve real-world problems, it adds useful extensions to the browser scripting environment and provides elegant APIs around the clumsy interfaces of Ajax and the Document Object Model.

prototypejs.org

Readmore.js

Readmore.js is a smooth, responsive jQuery plugin for collapsing and expanding long blocks of text with "Read more" and "Close" links.

jedfoster.com/Readmore.js/

Respond

A fast & lightweight polyfill for min/max-width CSS3 Media Queries (for IE 6-8, and more).

github.com/scottjehl/Respond

Responsive

A powerful, accessible, developer friendly framework for building responsive websites.

responsivebp.com

ResponsiveSlides.js

ResponsiveSlides.js is a simple & lightweight responsive slider jQuery plugin.

responsiveslides.com

script.aculo.us

script.aculo.us provides you with easy-to-use, cross-browser user interface JavaScript libraries to make your web sites and web applications fly.

script.aculo.us

ScrollMagic

ScrollMagic is a javascript library for magical scroll interactions.

github.com/janpaepke/ScrollMagic

Shuffle

Shuffle is a jQuery Plugin for categorize, sort, and filter a responsive grid of items.

vestride.github.io/Shuffle/

Sizzle

A pure-JavaScript CSS selector engine designed to be easily dropped in to a host library.

sizzlejs.com

SlickNav

SlickNav is a responsive mobile menu plugin for jQuery.

github.com/ComputerWolf/SlickNav

SPF

A lightweight JS framework for fast navigation and page updates from YouTube.

youtube.github.io/spfjs

SVG Morpheus

SVG Morpheus is a JavaScript library enabling SVG icons to morph from one to the other. It implements Material Design's Delightful Details transitions.

alexk111.github.io/SVG-Morpheus/

three.js

JavaScript 3D library - The aim of the project is to create a lightweight 3D library with a very low level of complexity — in other words, for dummies. The library provides <canvas>, <svg>, CSS3D and WebGL renderers.

github.com/mrdoob/three.js

Underscore.js

Underscore.js is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects. It’s the answer to the question: “If I sit down in front of a blank HTML page, and want to start being productive immediately, what do I need?” … and the tie to go along with jQuery's tux and Backbone's suspenders.