Yii2 Null CMS
Project with preinstalled modules for managing other modules and app configs.
It aims to be an "empty" CMS which doesn't limit external modules with doing what they need to. You may develop and include your own yii2 module with no need to "follow rules" of this CMS. Because it doesn't have any.
It has includes user, rbac, i18n, notice(mail), page, event, theme modules. You may require other modules with composer and choose them from admin area.
The minimum requirement by this application template that your Web server supports PHP 5.4.0 and MySQL 5 database engine.