Windows Store app
With the advent of Windows S for schools and students, it would be nice to have a Windows store app, otherwise there is no way to install Mnemosyne on this kind of OS (no .exe files allowed).
And isn't education the primary purpose of Mnemosyne?
I think that with time Microsoft will push developers to convert win32 programs to Windows store apps anyway, because of this OS. I heard there is project Centennial for that now. Universal Windows App would also satisfy those who call for a Windows Mobile app. But I'm not an expert, maybe it's too hard.