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Game Related

http://www.gamasutra.com/

Website for game developers

http://www.persuasivegames.com/

independant gamedevelopers

Theatre&New Media

Europe:
http://www.filmfabriek.com/

media design for theatre

http://on1.zkm.de/zkm/e/

new media institute based in kalsruhe Germany

http://www.ruudlanfermeijer.nl/

Designer of shade interactive

http://www.pipslab.nl/

Crazy people doing crazy fun things

http://www.trampoline.org.uk/about.htm

stimulate new projects

http://www.iets.be/

Collevtive of Belgian artists

http://www.planetart.nl/

Foundation based in Enshede doing crazy things

http://noisivision.nl/index.html

group based in Eindhoven organising mixed-up events

U.S.:
http://digitalperformance.org/

Blog about artists which embrace technology

http://www.gertstein.org/

Theatre company that supports digitalperformances.org

http://www.thekitchen.org/

non profit organization based in New York for artists

http://beallcenter.uci.edu/

Center for new media and gallery

Other:
http://www.mixedrealitylab.org/

Mixed reality reserch lab based in Singapore

NewMedia

Netherlands:
http://www.v2.nl

New media institute

http://www.mediamatic.net

Newmedia, art and culture

http://www.montevideo.nl/

Dutch institute for media art

http://scii.nl/

Dutch organisation...

http://www.sat.qc.ca/index.php?lang=en

French new media center

http://graffitiresearchlab.com/

Graffiti meets new media

Germany:
http://whitevoid.com/

Berlin based interactive art&design group

http://www.bitnik.org/en/

Gemran art collective

Italy:
http://www.todo.to.it/

Italian design collective

http://isole.ecn.org/aha/English/index_en.htm

Italian Community activism-hacking-artivism

US:
http://www.derivativeinc.com/

Software company for interactive tools for artists

http://rhizome.org/

Net art, community and more

UnKnown
http://goto10.org

Theatre Groups

Europe:
http://www.shade.nl/

theatre group who works regularly with new media

http://www.shade.nl/index2.php?lang=nl

shade interactive

http://www.ish-events.com/

skate theatre group

http://seesproject.com/

Theatre collective

http://www.zip.nl/

A organization that helps theatre groups with the business side of things

U.S./Canada:
http://www.amdat.org/index.html

New York based new media-dance company

http://www.dtw.org/

New York based place for artist to work

http://www.snappydance.com/

Boston based Dance Company

http://www.bridgmanpacker.org/index.php

American dance group

http://www.4dart.com/

Canadian theatre group that uses holographic images

Other:

Design Company/group

http://www.magnetstudio.com/

Grpahic desing compagny based in London

http://www.softmedia.nl/

Dutch new media company based in Eindhoven

http://loop.ph/bin/view/Loop/WebHome

Designers

http://submarine.nl

Dutch Company who makes digital content

http://uva.co.uk

A team of Visual Artists doing some very inspiring projects

http://woestijninblik.com

Dutch Ideas Company

http://www.shilodesign.com/

American Design company did things for MTV and much more

http://www.shivliz.com/

webdesign agency

http://www.onedotzero.com/home.php

Cros media company who do also installations

http://www.shapers.nl/index.php

Dutch interaction design company

http://www.heyhush.com/

Amarcian design Group

http://www.grdd.co.uk

London based design group

http://www.simplebits.com/

Website design studio

http://www.qubekonstrukt.com/

Design collective form Australia

http://www.studioazzurro.com/

Research studio based in Italy

Hardware Compagnies

http://www.adafruit.com/

The buy self made pre made gadgets

http://www.freeset.com/

not exactly a hardware company, but the offer hardware solutions..

Schools

http://www.sandberg.nl/

School for arts ?

http://www.i-dat.org/go/home

digital art education

http://www.kabk.nl/lab/index.html

lab for Art and RFiD

http://www.dmiboston.org

school about dynamic media used in communication

http://www.accademiacarrara.it/

school of new media

Social Related

http://www.bof.nl/index.html

Website about digital civilian rights