Interesting to learn to about Processing software. (it is a software that can be used to produce Visual Arts).
Enclosed below a short synopsis about Processing (lifted it from about page)
"Processing is a programming language, development environment, and online community that since 2001 has promoted software literacy within the visual arts. Initially created to serve as a software sketchbook and to teach fundamentals of computer programming within a visual context, Processing quickly developed into a tool for creating finished professional work as well."
Cool apps, it displays on the bottom the data points in the Venn Diagram. Clicking on any of the venn diagram changes the data displayed in the bottom.You can get more information about the above twitter app at Jeff Clark'sTwitterVenn apps and about Processing here.