Scenejs
An extensible WebGL-based engine for high-detail 3D visualisation
Sequence
The Responsive Slider with Advanced CSS3 Transitions
Responsive Img
Responsive Img is a jQuery plugin that changes an image's src attribute based on its container's width.
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.
Lightgallery.js
Full featured javascript lightbox gallery. No dependencies.
Cropper
A simple jQuery image cropping plugin.
Microfiche.js
A carousel library made With Associates, focusing on performance, simplicity and touch.
Nivo Slider
The Most Awesome jQuery Image Slider
Html2canvas
Screenshots with JavaScript
Fotorama
A simple, stunning, powerful jQuery gallery. Licensed under the MIT.
FancyBox
FancyBox is a tool that offers a nice and elegant way to add zooming functionality for images, html content and multi-media on your webpages.
Paper.js
The Swiss Army Knife of Vector Graphics Scripting – Scriptographer ported to JavaScript and the browser, using HTML5 Canvas. Created by @juerglehni & @jonathanpuckey
Photoset Grid
A simple jQuery plugin to arrange images into a flexible grid, based on Tumblr's photoset feature.
Magnific Popup
Light and responsive lightbox plugin with focus on performance.
Bxslider 4
Responsive jQuery content slider
Processing.js
A port of the Processing visualization language to JavaScript.