I started a project named the VoyaTrax CMS Project in 2014. The output of that is vtCMS, a modded version of XOOPS 188.8.131.52 (we were planning a 184.108.40.206 version, see the website as to why NOT) with some improvement that never found it's way there. I've added a Terms, Privacy Ploicy, Imprint, Disclaimer and an About Us page. All hardcoded into the system along with backend administration, including an editor.
Other enhancement include UTF-8 as well as modules that are needed in every CMS, such as a contact module, security module, a language module for multilingual content. Another enhancement is an Cookie announcement - compliant with the European Cookie Law.
Many more enhancements are in planning as well as getting some general purpose modules upto date. Themeing is also a place where lot's of enhancemet need to take place.
Of course I'm sticking to the GPL, the original core is GPLv2 but I'm uping that to GPLv3.