Processing is an open source programming language and environment for people who want to program images, animation, and interactions. It is used by students, artists, designers, researchers, and hobbyists for learning, prototyping, and production. It is created to teach fundamentals of computer programming within a visual context and to serve as a software sketchbook and professional production tool. Processing is an alternative to proprietary software tools in the same domain.
Processing is free to download and available for GNU/Linux, Mac OS X, and Windows.
Using the transcripts of Bill Gates' keynote from CES 2007 and Steve Jobs' keynote at Macworld 2007 (via Todd Bishop's Microsoft Blog) I created this relational tagcloud using Rhizome Navigation.