Popular Linux OS download links

Fedora Core:
http://mirrors.fedoraproject.org/publiclist/Fedora/8/

Ubuntu:
http://www.ubuntu.com/getubuntu/download

Open Suse:
http://software.opensuse.org/

Debian:
http://www.debian.org/releases/stable/debian-installer/

Slackware:
http://www.slackware.com/getslack/list.php?country=USA

Gentoo:
http://www.gentoo.org/main/en/where.xml

Mandriva:
http://www.mandriva.com/en/download

Knoppix:
http://www.knopper.net/knoppix-mirrors/index-en.html