What is "zikula"

Zikula is a free open source web application framework released under the GNU General Public License. It can be used to develop robust, secure, interactive and editable websites and web based applications. Zikula is written in object oriented PHP and is fully modular. It requires a database and may use leading platforms like MySQL, PostgreSQL, Oracle Database and Microsoft SQL Server. Development of the program began as a successor to the PostNuke framework, and as of 2008 replaced it as the focus of all new development. Earlier PostNuke development also influenced other still active projects, such as Xaraya.