Joint
JavaScript diagramming library
Isomer
Simple isometric graphics library for HTML5 canvas
jQuery Backstretch
Backstretch is a simple jQuery plugin that allows you to add a dynamically-resized, slideshow-capable background image to any page or element. The image will stretch to fit the page/element, and will automatically resize as the window/element size changes.
Imager.js
Responsive images while we wait for srcset to finish cooking
Ejecta
A Fast, Open Source JavaScript, Canvas & Audio Implementation for iOS
Croppie
A Javascript Image Cropper
Svg.js
A lightweight library for manipulating and animating SVG
Cannon.js
A lightweight 3D physics engine written in JavaScript.
Jimp
An image processing library written entirely in JavaScript for Node, with zero external or native dependencies.
Lightslider
JQuery lightSlider is a lightweight responsive Content slider with carousel thumbnails navigation
Flex Slider
An awesome, fully responsive jQuery slider plugin
Raphael
JavaScript Vector Library
Processing.js
A port of the Processing visualization language to JavaScript.
Bonsai
BonsaiJS is a graphics library and renderer
Baraja
Baraja is a jQuery plugin that allows to move elements in a card-like fashion and spread them like one would spread a deck of cards on a table.
Sylvester
Vector, matrix and geometry math JavaScript
jQuery Focuspoint
jQuery plugin for 'responsive cropping'. Dynamically crop images to fill available space without cutting out the image's subject. Great for full-screen images.