The X Pro is a clean, lightweight and fully responsive Drupal 8 and 9 base theme. This theme will be used as the base theme by many themes developed here at Drupar.com
Themes using The-X-Pro as Base theme
Base Theme Used by The-X
The-X theme version 8.x.x uses stable as the base theme.
The-X theme version 9.x.x uses stable9 as the base theme.
The-X-Pro is not dependent on any third party modules / themes. All it uses is Drupal core modules and features. All its features are inbuilt. The base theme used by The-X-Pro is part of Drupal core.