Morpheus
A Brilliant Animator
Mobiscroll
The customizable HTML5 spinner/scroller control for touch devices like smartphones and tablets
Jquery Tokeninput
Tokeninput is a jQuery plugin which allows your users to select multiple items from a predefined list, using autocompletion as they type to find each item. You may have seen a similar type of text entry when filling in the recipients field sending messages on facebook.
Jo
Jo is a thin (~12K) candy shell for PhoneGap apps. It's an HTML5 mobile app framework which provides UI widgets, a flexible event model, a wrapper for sound, and a light data layer. Apps are skinnable with CSS3, and work everywhere PhoneGap does... and then some, including Adobe Air and OSX (desktop and dashboard).
Jcrop
Jcrop (official) - Image Cropping Plugin for jQuery
Framework7
Full Featured HTML Framework For Building iOS & Android Apps
Fastclick
Polyfill to remove click delays on browsers with touch UIs
Delorean
An Agnostic, Complete Flux Architecture Framework
Dayjs
⏰ Day.js 2KB immutable date library alternative to Moment.js with the same modern API
Clusterize.js
Tiny vanilla JS plugin to display large data sets easily
Browser Sync
Keep multiple browsers & devices in sync when building websites. http://browsersync.io
Animatelo
Animatelo is a bunch of cool, fun, and cross-browser animations for you to use in your projects. This is a porting to Web Animation API of the fabulous animate.css project.
Aframe
:a: web framework for building virtual reality experiences.
Textillate
A simple plugin for CSS3 text animations
Yarn
Fast, reliable, and secure dependency management.
Processing.js
A port of the Processing visualization language to JavaScript.
Pdfmake
Client/server side PDF printing in pure JavaScript