Gloss mingwin as "Minimalist [GNU]
for Windows" [http://www.mingw.org/].
Is "mingw32" an exact synonym?  In any
case, one often sees the latter, also.
Some idiolects seem to favor "minimal"
for "minimalist", also.

Most of the excitement linking mingwin
and [Tcl] has to do with [critcl] and
its potential, first to maintain portable
extensions far more conveniently, and 
then to ...