Trimming the fat with Fluxbox
One of the oft touted reasons to use openSUSE is the stellar support and packaging for a wide-variety of desktop environments, normally leading people to think of the four mainstays of the Linux desktop: GNOME, KDE, LXDE, XFCE. While the amount attention focused on the "big four" is certainly the lion's share, there is still a lot of attention paid towards less popular window managers and desktop environments like Enlightenment, Openbox, Window Maker or Fluxbox.
Window managers, unlike desktop environments, strive to follow the unix philosophy of "do one thing, do it well" so you won't see a lot of the bells and whistles you might be familiar with from KDE or GNOME. On the flip side however, you'll see reduced memory and CPU usage.