Heatmap.js
JavaScript Library for HTML5 canvas based heatmaps
Balloon.css
Simple tooltips made of pure CSS
Flex Slider
An awesome, fully responsive jQuery slider plugin
Bootstrap Tour
Quick and easy product tours with Twitter Bootstrap Popovers
Stream Saver.js
StreamSaver writes stream to the filesystem directly asynchronous
Odometer
Smoothly transitions numbers with ease. #hubspot-open-source
jQuery.nicescroll
nicescroll plugin for jquery - scrollbars like iphone/ipad
Colorbox
A light-weight, customizable lightbox plugin for jQuery
Datamaps
Maps for interactive data visualizations in Javascript
Prosemirror
The ProseMirror WYSIWYM editor
Holder
Holder renders image placeholders entirely on the client side.
Tonal
A functional music theory library for Javascript
Ractive
Next-generation DOM manipulation
Open Jscad.org
OpenSCAD + JavaScript = OpenJSCAD, edit locally or remote online, preview in browser direct via WebGL.
Imba
The new programming language for web apps
Touch Swipe jQuery Plugin
TouchSwipe is a jquery plugin to be used with jQuery on touch input devices such as iPad, iPhone etc.
Gridster.js
gridster.js is a jQuery plugin that makes building intuitive draggable layouts from elements spanning multiple columns