Joint
JavaScript diagramming library
Holder
Holder renders image placeholders entirely on the client side.
Cortex
A javascript library for centrally managing data with React
Colorpicker
jQuery UI widget for color picking (similar to the one in Microsoft Office 2010).
jQuery Steps
A powerful jQuery wizard plugin that supports accessibility and HTML5.
Angular Datepicker
calendar and datepicker directives for angular
jQuery Pjax
pushState + ajax = pjax
Normalize.css
A modern, HTML5-ready alternative to CSS resets (as used by Twitter Bootstrap, HTML5 Boilerplate, TweetDeck, Soundcloud, and many others).
Isomer
Simple isometric graphics library for HTML5 canvas
G2 Plot
:dango: An interactive and responsive charting library
Fine Uploader
Multiple file upload plugin with progress-bar, drag-and-drop.
Dropzone
Dropzone is an easy to use drag'n'drop library. It supports image previews and shows nice progress bars.
RequireJS
A file and module loader for JavaScript
Dc.js
Multi-Dimensional charting built to work natively with crossfilter rendered with d3.js
Sweetalert
A beautiful replacement for JavaScript's "alert"
Slideout
A touch slideout navigation menu for your mobile web apps.
Rickshaw
JavaScript toolkit for creating interactive real-time graphs