Free-soft.org - General information on Free Software (Open Source) and its community.
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.
Open... - Weblog with news and comment on developments in open source, open genomics, and open content.
Open Ideas - User community support to Free Software projects, providing a news board, forums and wiki, as well as hosting services for mirrors.
Open Source Business Resource - Free monthly publication for Canadian business owners, company executives and employees, covering issues on free software in a business and institutional environment.
Open Source Resources - Resource site for Open Source Software researchers. Contains a bibliography, news and opinion sources, and links.
Panday.Net - A community website for Filipino Open Source Software / Free Software (OSS/FS) advocates.
Softpanorama - (slightly skeptical) open source software educational society. Eastern European focus; many links are ideal for those with few resources in hardware or money.
Sun Source.net - Site about Sun's involvement in free and open source projects.