Responsive Img
Responsive Img is a jQuery plugin that changes an image's src attribute based on its container's width.
Lightgallery.js
Full featured javascript lightbox gallery. No dependencies.
jQuery QR Code
qrcode generation standalone (doesn't depend on external services)
Vegas
Vegas is a jQuery plugin to add beautiful fullscreen backgrounds to your webpages. It even allows Slideshows.
Isomer
Simple isometric graphics library for HTML5 canvas
Html2canvas
Screenshots with JavaScript
Fotorama
A simple, stunning, powerful jQuery gallery. Licensed under the MIT.
Ejecta
A Fast, Open Source JavaScript, Canvas & Audio Implementation for iOS
Paper.js
The Swiss Army Knife of Vector Graphics Scripting – Scriptographer ported to JavaScript and the browser, using HTML5 Canvas. Created by @juerglehni & @jonathanpuckey
Nivo Slider
The Most Awesome jQuery Image Slider
Jcrop
Jcrop (official) - Image Cropping Plugin for jQuery
Processing.js
A port of the Processing visualization language to JavaScript.
Joint
JavaScript diagramming library
Raphael
JavaScript Vector Library
Flickity
:leaves: Touch, responsive, flickable carousels
Photoset Grid
A simple jQuery plugin to arrange images into a flexible grid, based on Tumblr's photoset feature.
Kinetic Js
KineticJS is an HTML5 Canvas JavaScript library that extends the 2D context by enabling canvas interactivity for desktop and mobile applications.