Processing is an open source programming language and environment for people who want to program images, animation, and interactions. It is an open project initiated by Ben Fry and Casey Reas. It can be downloaded from

All sketches shared on OpenProcessing are licensed under Creative Commons Attribution-Share Alike 3.0.
All source code provided is licensed under
Creative
Commons GNU General Public License.

There are many classes and workshops around the world that teach Processing, and OpenProcessing.org is a host to many of these, by allowing professors and students to collaborate on the web, and share with the world how they study Processing.
See the list of classes that use OpenProcessing.
Here is a quick link to a data visualization I created in March, visualizing the interactions between the users in OpenProcessing. http://www.openprocessing.org/labs/opviz...
Read more at the blog...