Lately I discovered that some software I used to run X applications on Windoze converted from open-source to quasi non-open-source software. It's about Xming whose latest free version is almost 6 years old. More to this they state on their commercial website (you'll find it, I won't make them too much publicity) that you need a "donor password" in order to download the latest versions of Xming. Ok, I understand, but fuck you too!
Luckily some people started a new project called VcXsrv which seems to be a good alternative to Xming.
So far it hasn't failed on me, so I think is a good enough free X server to be used on Windoze platforms.