shanecoughlan writes "FreeDOS, the GPL DOS distribution, has a powerful little graphical user interface called OpenGEM being actively developed for it. Well, powerful is relative. OpenGEM is based off the DR GEM GUI from the 1980s, and is a 16bit single-tasking GUI that tends not to use extended memory. While KDE and GNOME might not be shaking in their boots, it's an interesting opensource project in its own right. And it runs on a 286 with 640kb of RAM..."