LinuxBSDos.com shows you how to install Cinnamon in Ubuntu 11.10
Cinnamon is a new desktop environment, forked from GNOME 3 by the developers of Linux Mint. It is intended as an optional desktop for those who have not taken kindly to GNOME 3 or Unity desktop environments. While it is still very rough around the edges, I find it a lot better to use than GNOME 3 and slightly better than Unity.How to install Cinnamon in Ubuntu 11.10
It has nothing on KDE, though. If you are looking for a good distribution that uses KDE, you might want to read the top 6 KDE distributions of 2011.