Qondrite allows you to create Qt projects with Meteor backends. This seems like an ideal way to make an open source version of something like Parse, where you get a simple server-side system that has mobile support. I've never written any QML myself, but I'd be interested to see if Qt for iOS could be used with Qondrite.
Attila has posted a video where you can see the library in action: Meteor and Qt. If you want to install the library, take a look at the installation details in the readme. There's also a demo application with a small QML file: