X windows server for windows

For a long time I didn't know of a good, free X windows server for windows. Apparantly Cygwin can do this, but I wasn't really sure how to set it up. But now there's this:

http://xlivecd.indiana.edu/

It's basically a prepackaged install of Cygwin with everything set up for running X applications over SSH with secure tunnelling. You can run it from the CD if you have to use a windows lab or something, or you can install it to your hard drive.