• Fedora – Red Hat distro – Desktop Gnome by default KDE available
  Architectures i386, x86_64, ppc
  fedoraproject.org
• Debian – Desktop User’s choice
  Architectures i386, amd64, ppc, s390, ia64 m68k, sparc, alpha, arm, mips, hppa
  www.debian.org
• CentOS – variant of Red Hat Enterprise Linux – Desktop Gnome
  Architectures i386, x86_64
  www.centos.org
• OpenSUSE – Novell’s open Linux distro – Desktop Gnome by default KDE available
  Architectures i386, x86_64, ppc, ia64
  www.opensuse.org
• Mandriva – Desktop KDE by default GNOME available
  Architectures i586, x86_64
  www.mandriva.com
• Ubuntu – the most popular distro – Desktop Gnome by default KDE available
  Architectures i386, amd64, sparc
  www.ubuntu.com
• Gentoo – DIY distribution – Desktop User’s choice
  Architectures x86, sparc, amd64, ppc, ppc64, alpha, hppa, mips, ia64, arm
  www.gentoo.org
• KNOPPIX – Live CDs  – Desktop KDE
  Architectures x86
  www.knoppix.com
• Slackware – the oldest distros – Desktop KDE
  Architectures x86
  www.slackware.com
• DSL – tiny distro / older machines – Desktop Fluxbox
  Architectures i386
  www.damnsmalllinux.org
• Arch Linux – distro for power users – Desktop User’s choice
  Architectures i686, x86_64
  www.archlinux.org
• PCLinuxOS – Desktop KDE
  Architectures x86
  www.pclinuxos.com
• Sabayon – binary distro built with Gentoo – Desktop KDE by default Gnome and others available
  Architectures i386, x86_64
  www.sabayonlinux.org
• Zenwalk – Slackware derivativefor limited computers – Desktop Xfce
  Architectures x86
  www.zenwalk.org

(Mirror List with Linux Distro)