The Pagekit CMS
That are too many nice toys to play with for me to resist. I've set up an installation and started creating some code. Reverse engineering the modules in the core, it is not hard to find out how the framework sticks together. The big help is also the Pagekit Gitter chat, where the devs of Pagekit at YOOtheme are easy to contact, and very willing to help.
I'll see where this leads to, I sure like the look of the code style and modulair design. This will certainly teach me a lot, so it's a win in any way!