Fabric.js
Javascript Canvas Library, SVG-to-Canvas (and canvas-to-SVG) Parser
Js Barcode
Barcode generation library that works in both the browser and on Node.js http://lindell.me/JsBarcode
X3dom
X3DOM. A framework for integrating and manipulating X3D scenes as HTML5/DOM elements.
Svgo
SVGO is a Nodejs-based tool for optimizing SVG vector graphics files.
Maker.js
📐⚙ Library for creating 2D vector drawings for CNC and laser cutter machines.
3 Dmol.js
WebGL accelerated JavaScript molecular graphics library
Cannon.js
A lightweight 3D physics engine written in JavaScript.
Proton
A particle engine for html5
Dagre
Directed graph renderer for javascript
Two.js
A renderer agnostic two-dimensional drawing api for the web.
P2.js
JavaScript 2D physics library
Open Jscad.org
OpenSCAD + JavaScript = OpenJSCAD, edit locally or remote online, preview in browser direct via WebGL.
jQuery.panzoom
A jQuery plugin for panning and zooming elements using CSS3.
Pixastic
JavaScript Image Processing Library
Oimo.js
Lightweight 3d physics engine for javascript
Litegl.js
Lightweight Javascript WebGL library for handling Context, Meshes, Textures and Shaders. Relies on glMatrix 2.0, very easy to use.
Photo Swipe
PhotoSwipe is a HTML/CSS/JavaScript based image gallery specifically targeting mobile touch devices