knoppix http://knopper.net/knoppix/index-en.html
damn small linux http://www.damnsmalllinux.org/
morphix http://www.morphix.org/
ubuntulinux http://www.ubuntulinux.org/
gnome desktop, very nice, easy install gives the user just what they need.
simply mepis http://www.mepis.org/
yoper http://www.yoper.com/