Fine Uploader
Multiple file upload plugin with progress-bar, drag-and-drop.
Zxcvbn
zxcvbn, named after a crappy password, is a JavaScript password strength estimation library. Use it to implement a custom strength bar on a signup form near you!
Jexcel
jExcel | the javascript spreadsheet is a very light jquery plugin to add a excel compatible spreadsheet in your application or web based software. Create smarter apps including data tables, grid and spreasheets with this awesome jquery spreadsheet plugin. For live examples, please visit:
Gpu.js
GPU Accelerated JavaScript
Chai
BDD / TDD assertion framework for node.js and the browser that can be paired with any testing framework.
Editor
Next-gen, highly customizable content editor for the browser - based on React and Redux. WYSIWYG on steroids.
Onsen Ui
Custom Elements-Based HTML5 UI Framework for Building Your Mobile Front End
Vivus
JavaScript library to make drawing animation on SVG
Riotjs
The 1kb client side MV* library
Knockout
Knockout makes it easier to create rich, responsive UIs with JavaScript
Pikaday
A refreshing JavaScript Datepicker — lightweight, no dependencies, modular CSS
Litegraph.js
A graph node engine and editor written in Javascript similar to PD or UDK Blueprints, comes with its own editor in HTML5 Canvas2D. The engine can run client side or server side using Node. It allows to export graphs as JSONs to be included in applications independently.
Parallax
Parallax Engine that reacts to the orientation of a smart device
SockJS Client
WebSocket emulation - Javascript client
Raphael
JavaScript Vector Library
Count Up.js
Animates a numerical value by counting to it
Magnific Popup
Light and responsive lightbox plugin with focus on performance.