[http://www.xfce.org—The official site for the Xfce desktop](http://www.xfce.org—The official site for the Xfce desktop)
[http://www.xubuntu.org—The official Xubuntu site](http://www.xubuntu.org—The official Xubuntu site)
[http://www.lxde.org—The official site for the LXDE desktop](http://www.lxde.org—The official site for the LXDE desktop)
[http://lubuntu.net—The official Lubuntu site](http://lubuntu.net—The official Lubuntu site)
[http://www.gnome.org—The official site for the GNOME desktop](http://www.gnome.org—The official site for the GNOME desktop)
[http://ubuntubudgie.org—The official Ubuntu Budgie site](http://ubuntubudgie.org—The official Ubuntu Budgie site)
https://ubuntu-mate.org—The official Ubuntu MATE site
https://wiki.ubuntu.com/UbuntuKylin—The English language
resource for Ubuntu Kylin
http://www.ubuntu.com/project/about-ubuntu/derivatives—The
official Ubuntu list of recognized derivatives
[http://www.knoppix.net—The site for the live CD/DVD Linux distribution,](http://www.knoppix.net—The site for the live CD/DVD Linux distribution,)
Knoppix
[http://en.wikipedia.org/wiki/Desktop_environment—A detailed](http://en.wikipedia.org/wiki/Desktop_environment—A detailed)
definition of desktop environment, how they work, why they exist, and
so on
http://en.wikipedia.org/wiki/Comparison_of_X_Window_System_desktop_environments
—An amazing list of available desktop environments, complete with a
comparison of features