Ubuntu

http://ubuntu.com
http://releases.ubuntu.com (maintenues)
http://old-releases.ubuntu.com/releases (non maintenues)
https://wiki.ubuntu.com timeline

http://ubuntu-fr.org

http://www.framabook.org
http://www.framabook.org/docs/ubuntu/framabook2_ubuntu-9-10_v7_creative-commons-by-sa.pdf

Autres

http://lubuntu.net
http://linuxmint.com
http://www.ubuntucomplete.co.uk