In 1996 I ported a large bunch of code from NEXTSTEP to Windows using the GNU runtime. That was all pre-OpenStep (OK, it wasn't, but the code didn't use Foundat

In 1996 I ported a large bunch of code from NEXTSTEP to Windows using the GNU runtime. That was all pre-OpenStep (OK, it wasn't, but the code didn't use Foundation, had no UI, etc, so it didn't depend on any class libraries beyond the runtime itself). But it has been possible for at least twenty years! (And there was always GNUstep.) Another interesting thing is Apportable's Foundation implementation, it's really nice and is LGPL'd. I wonder if MS licensed that.