Paper.js is currently the primary creative framework that I use for my creative coding. I really like its API, which is easy to use and extend, the ease in exporting vectors graphics from it (making it easy to create high resolution prints), and the general ease of development due to the use of JavaScript and running within the browser. While I do sometimes miss the higher performance that lower level frameworks like processing or openFrameworks provide, for the most part the advantages of Paper.

Recently I have been spending some time playing around with Paper.js, an open source vector graphics scripting framework that runs on top of the HTML5 Canvas, similar to CreateJS. One of the cool features of Paper.js (and the reason I am using it) is that it has support for exporting its content via SVG. Among other things, this allows me to bring anything I create into Illustrator, and gives me the option to do resolution independent prints.