Cygwin/X: Meaning (information, definition, explanation, facts)

Cygwin/X is an implementation of the X Window System that runs under Microsoft Windows. It is free software.

Cygwin/X is part of the Cygwin project, and can be installed using Cygwin's standard setup system.

Cygwin/X originally used XFree86, but now uses the XOrg Server, owing to concerns over XFree86's new license not being compatible with the GPL, which Cygwin is licensed under.