Balloon.css
Simple tooltips made of pure CSS
Bootstrap Tour
Quick and easy product tours with Twitter Bootstrap Popovers
Flex Slider
An awesome, fully responsive jQuery slider plugin
Heatmap.js
JavaScript Library for HTML5 canvas based heatmaps
Open Jscad.org
OpenSCAD + JavaScript = OpenJSCAD, edit locally or remote online, preview in browser direct via WebGL.
jQuery.nicescroll
nicescroll plugin for jquery - scrollbars like iphone/ipad
Datamaps
Maps for interactive data visualizations in Javascript
Colorbox
A light-weight, customizable lightbox plugin for jQuery
Tonal
A functional music theory library for Javascript
Odometer
Smoothly transitions numbers with ease. #hubspot-open-source
Prosemirror
The ProseMirror WYSIWYM editor
Holder
Holder renders image placeholders entirely on the client side.
Zip.js
JavaScript library to zip and unzip files
Ractive
Next-generation DOM manipulation
Intercooler Js
Making AJAX as easy as anchor tags
Touch Swipe jQuery Plugin
TouchSwipe is a jquery plugin to be used with jQuery on touch input devices such as iPad, iPhone etc.
Graphql Editor
GraphQL Visual Node Editor