Our What topics can I ask about here? page has this bullet point:
Content management systems (CMSs) -- There are specific Stack Exchange sites for several CMSs. Use those sites for WordPress, Drupal, Magento, Tridion, or Salesforce. Questions about other CMSs may be asked here on Pro Webmasters.
We have some more CMS sites now:
If we want to keep this bullet point, we should link to these sites, too.