"Fabric.js is a framework that makes it easy to work with HTML5 canvas element. It is an interactive object model on top of canvas element. It is also an SVG-to-canvas (and canvas-to-SVG) parser.

Using Fabric.js, you can create and populate objects on canvas; objects like simple geometrical shapes — rectangles, circles, ellipses, polygons, or more complex shapes consisting of hundreds or thousands of simple paths. You can then scale, move, and rotate these objects with the mouse; modify their properties — color, transparency, z-index, etc. You can also manipulate these objects altogether — grouping them with a simple mouse selection.

You can add text on canvas and dynamically manipulate its size, alignment, fontfamily and other properties. You can apply filters to images, making them grayscale or removing background. You can serialize the entire canvas into a JSON string — saving it locally or on a server — then completely restore it at any time. You can also export canvas data back into SVG at any time."

Very cool, render PDFs natively with JavaScript and HTML5 (Work in progress)

"D3 allows you to bind arbitrary data to a Document Object Model (DOM), and then apply data-driven transformations to the document. As a trivial example, you can use D3 to generate a basic HTML table from an array of numbers. Or, use the same data to create an interactive SVG bar chart with smooth transitions and interaction."

"Raphaël is a small JavaScript library that should simplify your work with vector graphics on the web. If you want to create your own specific chart or image crop and rotate widget, for example, you can achieve it simply and easily with this library."

"Lindenmayer-Systems (L-Systems) are described using simple grammars. A L-System consists of an axiom, rules, constants and symbols. The rules are first applied to the axiom and then to the resulting output for each iteration."