License

The COID/comm module, the coidgen tool and sample services are licensed under MPL/LGPL/GPL tri-license.
The COID/server library is licensed under MPL/LGPL/GPL/commercial licence.

This basically means that you are free to use the library even in a closed-source commercial project, as long as you distribute/provide the source code of all modifications made to the library along with your application. However, if you don't want to provide the source code of the modifications made to the server library, you have to negotiate a commercial licence with original developer. This is only possible for the COID/server library though.