LinuxPlanet.com
Linuxplanet -- a world of premium information for linux newcomers! we welcome people jumping from windows and other operating systems to the latest sensation based on the open source software model.
http://www.linuxplanet.com/linuxplanet/
Debian.org
Debian gnu/linux is a free distribution of the gnu/linux operating system. it is maintained and updated through the work of many users who volunteer their time and effort.
http://www.debian.org/
ManDrake.com
ManDrake.com
http://www.mandrake.com/
RedHat.com
RedHat.com
http://www.redhat.com/
SuSE.com
SuSE.com
http://www.suse.com/
Xandros.net
Xandros.net
http://www.xandros.net/