Processing is an easy-to-learn programming language that is geared towards visual programs. It’s completely free and even completely open source. It is very easy to make simple things and still powerful enough to do some really interesting things. There are lots of examples of what has been done at the Processing.org site. Processing builds to applets (so you can post them live on a web page), or to executable files. And it works for Windows, Mac and Linux.

Download Processing and learn more from http://processing.org