Kajona for all!
Kajona is open source - so everybody can use Kajona for free!
More precisely it's published under the GNU Lesser General Public License, short LGPL, in version 2.1.
The LGPL allows the usage also in commercial products.
All copyright references in the sourcecode-files must be keept in any circumstances.
References in the templates (e.g. "powered by Kajona" in the default-template) or the imprint don't have to be kept and are allowed to be removed.
A copy of the full license can be found in the filesystem folder "/system/" of a installed system.