vvvv is a hybrid graphical/textual programming environment for easy prototyping and development. It is designed to facilitate the handling of large media environments with physical interfaces, real-time motion graphics, audio and video that can interact with many users simultaneously. Responsible for its development is the vvvv group.
vvvv is free for non-commercial use, commercial use requires a license.
- Paul Prudence, "Patch Schematics – The Aesthetics of Constraint / Best Practices [Theory]". 
 See also