Remodal
Flat, responsive, lightweight, easy customizable modal window jquery plugin with declarative state notation and hash tracking.
Rellax
Lightweight, vanilla javascript parallax library
Please Js
JavaScript Library for creating random pleasing colors and color schemes
Pickadate.js
lightweight jquery date selector with multi-language support
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).
Aura
A scalable, event-driven JavaScript architecture for developing widget-based applications. Works with Backbone.js and other frameworks.
jQuery Smart Auto Complete
AutoComplete plugin with smart defaults and flexibility to customize
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.