GNU Help
A group of network architects, designers, developers, and admins offering support to organisations. Includes forum, papers and related links.
http://www.gnuhelp.net/

Open Source Development Network
The OSDN brings many of the Open Source community's favorite gathering places together and makes it easier to move between them.
http://www.osdn.com/

Panday.Net
A community website for Filipino Open Source Software / Free Software (OSS/FS) advocates.
http://www.geocities.com/panday_net/

Intel Open Source Computer Vision Library
The computer vision library will provide a wide range of functions, including gesture recognition, object-tracking, face recognition and camera calibration, that will help researchers develop ways to use "computer vision" as a method for people to interact with computers.
http://www.intel.com/research/mrl/research/opencv/

cugy.net - Computer Users Group of Yokota
A great resource for fun, information and of course... computers.
http://www.cugy.net/

A Quantitative Profile of a Community of Open Source Linux Developers
University of North Carolina, Chapel Hill, study: histories, analyses, explanations.
http://www.ibiblio.org/osrt/develpro.html

Softpanorama
(slightly skeptical) open source software educational society. Eastern European focus; many links are ideal for those with few resources in hardware or money.
http://www.softpanorama.org/

Free-soft.org
General information on Free Software (Open Source) and its community.
http://www.free-soft.org/

OpenSource.hp.com
A number of Open Source software projects that run on various HP (former Compaq) systems.
http://opensource.compaq.com/

Open Source Resources
Resource site for Open Source Software researchers. Contains a bibliography, news and opinion sources, and links.
http://opensource.ucc.ie/