Cannon.js
A lightweight 3D physics engine written in JavaScript.
Processing.js
A port of the Processing visualization language to JavaScript.
Joint
JavaScript diagramming library
Croppie
A Javascript Image Cropper
Svg.js
A lightweight library for manipulating and animating SVG
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.
Scenejs
An extensible WebGL-based engine for high-detail 3D visualisation
Bxslider 4
Responsive jQuery content slider
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.
Raphael
JavaScript Vector Library
Bonsai
BonsaiJS is a graphics library and renderer
Lightgallery.js
Full featured javascript lightbox gallery. No dependencies.
Ejecta
A Fast, Open Source JavaScript, Canvas & Audio Implementation for iOS
Kinetic Js
KineticJS is an HTML5 Canvas JavaScript library that extends the 2D context by enabling canvas interactivity for desktop and mobile applications.
Sylvester
Vector, matrix and geometry math JavaScript
Vegas
Vegas is a jQuery plugin to add beautiful fullscreen backgrounds to your webpages. It even allows Slideshows.
Flex Slider
An awesome, fully responsive jQuery slider plugin