[lug] Xwin emulator for MS Windows

I am looking for an Xwindows emulator for MS windows. I know of a few
such as xwin95, but is there a descent one that is free? Or at least,
somewhat lower cost than $236? I am developing a program in unix at my
work, but occasionally would like to be able to show this program to
others, and as it uses the xwindows enviroment, I cannot do this with
just SSH. Thanks!