I have a very old version of StarNet XWin-32. I think it is version 4 or something close. I recently got an email that they are up to version 9 with all kinds of bells and whistles and a USB flash drive version. I would love to get it, but I can't justify the price for as little as I use X11.
As Cygwin/X is minimalist, I was curious to know if there is something that is freeware and has more features than Cygwin/X. I should also check out NoMachines NX. I have seen it around, but have not used it myself.