I've mainly just started to learn my basics on C++/Qt and don't really have anything yet to show. Mainly I've just done a few simple prototypes to query the API and parse the XML. I've also done some UI sketches.

I'm also interested in QML, but as far as I know using QML would require you to create a date/time selector manually. Correct me if I'm wrong.

Even though I do not have anything to share at this moment, I'm interested in collaborating.

P.S. I just nearly shat my pants when I looked at the source code where you convert WGS84 to KKJ. Clearly my math skills are somehow rusty.