internet.com's Linux/Open Source Channel 
A comprehensive channel for links to Web sites for open source developers and users, from the beginner to the seasoned expert.
Firewall Redundancy with CARP and pfsync
An overview, introduction, and operational information for CARP.
Homepage of the Open Source Initiative
The latest OSI news, an index of licenses with definitions, open source links, translations of the Open Source Definition and the history of the OSI and its board of directors.
OpenBSD supported platforms
Official support means that the release install media is known to work, that the architecture can self-compile itself, and that most of the basic tools exist on the architecture.
OpenBSD Web site
The OpenBSD project produces a free, multi-platform 4.4BSD-based UNIX-like operating system.