My re-learning C++ project was:
https://gitlab.com/puu-os/installerMy biggest itch was what would be the coding convetion, which I base on establishment and popularity. I don't literally care otherwise how it is, as long as I don't have to think about it too much.
I'm familiar with WebKIt's conventions but it is essentially for single project only so needed something more broad so I picked Google's C++ style guide.
Getting grip of C++ has been fun and enjoy programming again in the user space. Much bigger exercise is the next version of ReadSeek, which I've been tinkering for a while already :-)