Alchemy is the Open Source Rails CMS framework for the component based web that can be used as classic server side rendered or headless CMS.
Ckeditor 4.x integration gem for rails
ComfortableMexicanSofa is a powerful Ruby on Rails 5.2+ CMS (Content Management System) Engine
File Based CMS and Static Site Generator
Ruby on Rails + CKEditor 5
An extendable Ruby on Rails CMS that supports Rails 6.0+
Spina CMS
A Ruby on Rails plugin (pre-Rails 3.1) that allows easy implementation of the TinyMCE editor into your applications.