Vvvv is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is Processing, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Vvvv and 11 are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Vvvv are Pure Data (Free, Open Source), Nodebox (Free, Open Source), Fugio (Free, Open Source) and OpenFrameworks (Free, Open Source).
Processing is an open source programming environment and library built to handle images, animation, and interactivity. It is used by students, artists, designers, researchers, and hobbyists for learning to code, prototyping, and producing full applications.
Pd (aka Pure Data) is a real-time graphical programming environment for audio, video, and graphical processing. It is the third major branch of the family of patcher programming languages known as Max (Max/FTS, ISPW Max, Max/MSP, jMax, etc.
Orca is an Esoteric Programming Language and live-coding environment for musical experimentation. In Orca, each letter of the alphabet is an operation, lowercase letters operate on bang, uppercase letters operate each frame.