An article about this content management system is available here.
You are granted the rights to use software to develop your own sites both non-profit and commercial provided you don't remove copyright notices from any of the files.
The software is made available as part of theGNU LESSER GENERAL PUBLIC LICENSE with the following additional restriction:
You may not write code generators or configuration tools that involve this software.
This restriction will not prevent you using the code to develop your own sites and to make money from them. It is simply there to prevent anybody who might want to supply some Web site production tool that encorporates the software.