VYV : creates, designs, and implements light-driven interactive visual environments
http://www.vyv.ca/

PHOTON est un serveur vidéo simple et flexible supportant un nombre illimité de projecteurs et d'écrans, pour des images de trés haute définition.
PHOTON permet de projeter sur des surfaces planaires, courbes et arbitrairement complexe tout en gardant un contrôle simple, efficace et temps réel sur le contenu diffusé.

LIGHT est un système interactif d'effets vidéo temps réel contenant une batterie d'effets spéciaux visuels modifiables, réagissant aux entrées vidéo et sonores.

max/msp/jitter : graphical programming environment for audiovisual applications.
http://www.cycling74.com

SoftVNS : video objects for Max
http://homepage.mac.com/davidrokeby/home.html
http://www3.sympatico.ca/drokeby/vnsII.html

mirage : free software built with max & softVNS specifically for video in the theatre.
http://sourceforge.net/projects/mirage

dbv-group - VideoMixer in Max/MSP/Jitter from JAPAN
http://dbv.gabocoy.com/archives/cat_about.php

pure data : the free cousin of max/msp
http://puredata.org/

David Buff work
http://www.david-buff.com/didascalie

working on 3D with Max/Sensors and Sound Spatialisation

this is a pure data patch created for the requirements of video in theatre :
http://www.nicole-banana.com/VI2O/index.html

nicolas bats has also created a light desk in pure data
http://www.nicole-banana.com/Pdada/index.html

Isadora
http://www.troikatronix.com/isadora.html

developed by Mark Coniglio out of his experience as co-director of Troika Ranch dance company.

High End Catalyst
http://www.highend.com/products/digital_lighting/catalyst.asp

Expensive but very powerful system. Not so open for interactive work but very stable and good performance. Is DMX controlled and can operate in a cluster of 'engines' through ethernet. Maximum video outputs is 2 screens. Full DV resolution clips and video input supported.

Media Servers

Obscura Digital
http://www.obscuradigital.com/

We have developed patent pending technology that allows us to display full motion, projected video on any surface without distortion.

))LightTwist((
http://tot.sat.qc.ca/eng/lighttwist.html

Pure Data based multiple projection onto curved surfaces (e.g dome)