Experimental Intermedia  
   Experimental Intermedia has been supporting musicians and artists experimenting with "intermedia" since 1968.
   http://www.experimentalintermedia.org/

Post Media  
   A Post Media Network represents the physical and virtual structure composed of editorial, curatorial, and artist projects focusing on the different perspectives of new media using electronic and computer based mediums.
   http://www.michelethursz.com/

äda 'web  
   Research and development platform, digital foundry with artists invited to experiment with, and reflect upon, the web as a medium.
   http://www.adaweb.com/

Network Museum and Magazine Project  
   International version of the Japanese web site for Dia Nippon Publishing, showcasing diverse web works by new media artists, with theory articles.
   http://www.dnp.co.jp/museum/nmp/nmp_i/eindex.html

Asseptic  
   Network of projects. A foyer leading to art, design, essays and web experiments.
   http://www.asseptic.org/

Artnetweb  
   One of the first net.art hosts.
   http://www.artnetweb.com/

Turbulence  
   Facilitates work exploring characteristics of the Web medium, making use of multimedia and online technologies.
   http://www.turbulence.org/

Ljubljana Digital Media Lab  
   Open-access media laboratory, an initiative of the Open Society Institute, Slovenia, supporting education and research in many fields related to net.art. Operates a guest program presenting international and local artists.
   http://www.ljudmila.org/

Easylife  
   Host of various net.art projects, new and old.
   http://www.easylife.org/

Rhizome ArtBase  
   Online archive of Internet art projects.
   http://rhizome.org/artbase/

IPL Pathfinder: Net.art  
   A research guide from the Internet Public Library.
   http://www.ipl.org/div/pf/entry/48510