Intercooler Js
Making AJAX as easy as anchor tags
Impress.js
It's a presentation framework based on the power of CSS3 transforms and transitions in modern browsers and inspired by the idea behind prezi.com.
Html2canvas
Screenshots with JavaScript
Hide Seek
A simple, mobile-friendly, yet customizable quick/live search jQuery plugin.
Hammer.js
A javascript library for multi-touch gestures // You can touch this
Globalize
A JavaScript library for internationalization and localization that leverages the official Unicode CLDR JSON data
Brjs
BladeRunnerJS (BRJS) is an open source development toolkit and framework for modular construction of large single-page HTML5 apps. It consists of a set of conventions, supporting tools and micro-libraries that make it easy to develop, test, deploy and maintain complex JavaScript apps.
Blazy
bLazy is a lightweight lazy loading and multi-serving image script. It's written in JavaScript why it doesn't have any dependencies for 3rd party libraries like jQuery. bLazy is working in all modern browser including IE7+.
Beerslider
A vanilla JS keyboard accessible plugin for any before-after comparison
Angular Fx
Angular CSS3 animation directives (ngfx-bounce, ngfx-shake, ngfx-flip, ngfx-pulse and more ...) https://720kb.github.io/angular-fx
Tether
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
Ace
Ajax.org Cloud9 Editor
Dropbox JS
JavaScript client library for the Dropbox API
Web Rx
WebRx is a Javascript MVVM-Framework built on ReactiveX for Javascript (RxJs) that combines functional-reactive programming with Observable-driven declarative Data-Binding, Templating and Client-Side Routing.
Fancy Input
Makes typing in input fields fun with CSS3 effects
Zoomooz
An easy-to-use jQuery plugin for making zooming web pages.
Typeit
The most versatile JavaScript typewriter effect library on the planet.