About being licensed under the LGPL ...
All psikeds specific libraries which are constituting the psikeds:client:sever - especially the requestor and the presentor libraries - are licensed under the LGPL v.3.0: Whoever distributes a (modified) version of these libraries must also distribute the corresponding sources of the libraries under the LGPL v.3.0. But you are allowed to develop and distribute your own client under your own terms as an on-top development based on these libraries - if you distribute the libraries themselves under the conditions of the LGPL v3.0.
... by the
- psiKeds licensing file: https://github.com/dtag-dbu/psikeds/blob/master/000-LICENSING
- LGPL license file: https://github.com/dtag-dbu/psikeds/blob/master/000-LicenseAddons/licenses/license-lgpl-3.0.txt
- original LGPL license file: http://opensource.org/licenses/LGPL-3.0