Xfree
MobaXterm v.8.6
MobaXterm is a set of network tools included in a single portable exe file. MobaXterm integrates an X server and several network clients (SSH, RDP, VNC, telnet, rlogin, sftp, ftp, ...) accessible through a tab-based terminal.
Cygwin X-Launcher v.1.22.0048
The X-Launcher is a utility created to tweak and configure the initial settings for an X-Server of the Cygwin project. Cygwin has been for some years an excellent emulator of the Linux platform for Windows.
Mocha X Server v.2.0
Mocha X Server is a simple to use PC X server software program that is running on a standard PC Windows platform, such as Windows XP.