two.js
A renderer agnostic two-dimensional drawing api for the web
...This means that when you draw or create an object (a Two.Path or Two.Group), two actually stores and remembers that. After you make the object you can apply any number of operations to it. Two.js has a built in animation loop. It is simple in nature and can be automated or paired with another animation library. Two.js features a Scalable Vector Graphics Interpreter. This means developers and designers alike can create SVG elements in commercial applications like Adobe Illustrator and bring them into your two.js scene.