I'm building Muziko, which is an app that will give you a list of songs every day to practice on your musical instrument of choice. I was planning to post it here eventually, but not for a long time, as I still need to build a UI that doesn't completely suck and fix some big issues. However, if this sounds cool, please have fun with it!

It's written in C++/Qt/QML. Native apps that are also completely crossplatform ftw.