I've done X11 forwarding over ssh now, but I want to try something similar when I'm working at Microsoft Windows. I know PuTTY could forward the X11 connection, so all I need is the server-part. But is there anything 'free' out there?, ...because I'm not willing to pay for something I'd use only a few times, because it's easier. (and for the fun)
I've been looking at cygwin, but haven't figured out how to run a X11 server with it. I'd prefer to use a clean, minimal program for this; cygwin seams to emulate unix entirely.
Is there any "good" software out there? googling didn't really help me.