Xoops : Xoops is an easy to use dynamic web content management system written in PHP.
Xoops

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Overview
Xoops is an easy to use dynamic web content management system written in PHP. XOOPS is an acronym of eXtensible Object Oriented Portal System. Though started as a portal system, XOOPS is in fact striving steadily on the track of Content Management System. It can serve as a web framework for use by small, medium and large sites.

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Features

- Database-driven
- Fully Modularized
- Personalization
- User Management
- Supported World-wide
- Multi-byte Language Support
- Versatile Group Permissions System
- Theme-based skinnable interface