I am introducing my first major contribution, a complete CMS, with full multilingual support and a fully OpenSource based on Yii. It has frontend and backend settings.
This system can be used as a base and performed the same functions with yii with a simple, complete and stable CMS.
All suggestions and contributions are wellcome. The system is based on Yii 1.1 waiting for migrate it to Yii 2 soon.
GitHub: https://github.com/juankamilo/yiiopencms
Demo: http://www.mediatic.com.co/proyectos/yiiopencms/
Cms: Based on NordCms 2.0