Whenever I think about the good old DOS days, QEMM and DESQview come to mind. Esp. DESQview which was a rather essential part of my DOS experience... Sources for these would be fun to look at.
Many asked over the years. Sadly I think Symantec lost them after it acquired Quarterdeck.
DESQview/X was amazing. FreeDOS with DV/X would be something else: a multitasking DOS with a standard GUI, that spoke TCP/IP and could serve remote Linux/BSD apps over X11.
