Dropzone
Dropzone is an easy to use drag'n'drop library. It supports image previews and shows nice progress bars.
Communist
JavaScript library for web workers.
Chance
Chance - Random generator helper for JavaScript
Caman Js
Pure Javascript HTML5 (Ca)nvas (Man)ipulation
Bricks.js
A blazing fast masonry layout generator for fixed width elements.
Bottlejs
A powerful, extensible dependency injection micro container for JavaScript applications
Assemble
Static site generator for Node.js, Grunt.js, and Yeoman (and soon, Gulp), using the Handlebars template engine. Used by Zurb Foundation, Zurb Ink, H5BP/Effeckt, Less.js / lesscss.org, Topcoat, Web Experience Toolkit, and hundreds of other projects to build sites, themes, components, documentation, blogs and gh-pages. Pull requests welcome, stars appreciated!
Angular Datepicker
calendar and datepicker directives for angular
Amplify
AmplifyJS is a set of components for data management and application communication.
Aload
Loads images, scripts, styles, iframes, videos and audio asynchronously.
Poly
Small, fast, awesome. The only ES5-ish set of polyfills (shims) you can mix-and-match because they're individual AMD modules.
Sticky Navbar.js
stickyNavbar.js: Fancy sticky navigation jQuery plugin with smart anchor link highlighting
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.
Verly.js
:red_circle::wavy_dash::large_blue_circle::wavy_dash::black_circle: Easy to integrate Verlet physics engine. :link:
Trace Kit
Attempts to create stack traces for unhandled JavaScript exceptions in all major browsers.
Sticky
jQuery Plugin for Sticky Objects