Open Source

Dynebolic: Free open source operating system
http://dynebolic.org

Gnome Files: GTK and software repository
gnomefiles.org

How To Forge: User contributed linux tutorials
howtoforge.com

Librenix: Information for Linux system admin
librenix.com"

Linux Command Line List: Information for Linux system admin
linuxguide.it

Mac Ports Project: Open-source site dedicated to compiling, installing, and upgrading either command-line, X11 or Aqua based open-source software for Mac OS X.
macports.org/

Open Source Flash: Forums, blog posts and tutorials as well as links to open source flash projects
osflash.org

XQuartz - Trac: An open-source effort to develop a version of the X.org X Window System that runs on Mac OS X
xquartz.macosforge.org/trac/