The goal of this project is to provide a minimal X Window System which will run out of the box on any Windows 7+ system. To realize this, I take a suitable installation package from the project VcXsrv Windows X Server (see https://sourceforge.net/projects/vcxsrv/), install it, remove all files that aren't needed for basic functionality and archive it to a .zip file.
Portable X-Server also integrates seamlessly into WinSSHTerm, a tabbed SSH solution for Windows:
http://www.winsshterm.net