Via slashdot is a cool article on The Ones That Didn't Make It: Windows' Failed Rivals. I remember OS/2 of course (and bought into that while waiting for the promised Windows95 release), but I do also remember GEM as a viable alternative windowing system way back in the day. I also cut my computer setup teeth on DESQview and QEMM. Ah, the memories.....
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QEMM386 and DESQview, then OS/2....boy that brings back the memories of the BBS days! Damn I'm getting old
Just wait until you realize that most people reading this won't know what a BBS is, much less have ever used one.