Kubuntu is a user friendly operating system based on KDE, the K Desktop Environment. With a predictable 6 month release cycle and part of the Ubuntu project, Kubuntu is the GNU/Linux distribution for everyone.
Mandriva began life as Linux Mandrake in July 1998 in France in Gael Duval's bedroom after he ported a KDE 1.0 desktop onto Red Hat Linux 5.1, uploaded the result onto two FTP servers, went away on holiday, and came back to find that he had a popular and successful Linux distribution on his hands