Although often classed as light-weight, Xfce qualifies as a medium weight amongst the Linux front ends. It's heavier than, say, LXDE or Window Maker but it uses less resources than KDE or Gnome.
In six previous posts I have looked at a variety of Linux Desktop Environments: Xfce, KDE, Gnome 3, Cinnamon, MATE, and LXDE. Now I am going to move one step lower in the GUI hierarchy, and look at ...