Xubuntu is a complete GNU/Linux based operating system with an Ubuntu base. It is lighter on system requirements and tends to be more efficient than Ubuntu with GNOME or KDE. It uses the Xfce desktop environment, which makes it ideal for old or low-end machines, thin-client networks, or for those who would like to get more performance out of their hardware.
Xubuntu is shipped with top quality packages from the Ubuntu archives. Xubuntu will use, as far as possible, GTK2 applications, ensuring maximum efficiency. If you wish, you can install any KDE or GNOME application on your Xubuntu desktop system, as it shares the Ubuntu main and universe package selection.
Xubuntu is released regularly and predictably; a new release is made every six months.