FREEBSD cross-platform compatibility

[Tom]

Question:

Is there an alternate-platform emulator available?  I have some programs 
that have no substitute available - and are Windows - only 
applications.  The developer right now says that they won't work on 
porting to other OSs for the foreseeable future - so Linux and FreeBSD - 
and Mac OS, for that matter - are left hanging.  Frankly, this one 
program in particular is the major reason I'm still running Windows at 
all.  So, either a Windows emulator, or some way to run this program in 
a non-Windows environment....

Thanks!

Tom S.