SuSE (SLED, OpenSuSE, etc.)
Slackware
Mandriva (Mandrake Linux, Connectiva, Lycoris)
Fedora
Gentoo
Knoppix
Red Hat
CentOS
Debian
Ubuntu
Others ( Dreamlinux, gOS, Foresight Linux, Linux Mint, Arch. Slax, Sabayon, etc)