[password4321]

Last I checked, there is a Windows WebKit/Safari build. I don't think it worked very well though: https://news.ycombinator.com/item?id=20700914#20701334

Edit: Looks like the new URL is https://build.webkit.org/#/builders/67?numbuilds=400 but the build has been broken for almost 2 weeks. The last successful build is the 300MB https://s3-us-west-2.amazonaws.com/archives.webkit.org/win-x... (as explained in the link above, the Apple Application Support libraries are required).