[omegavesko]

>Unfortunately, the built-in IDE for Unity is MonoDevelop, which has all the problems Xamarin does, You don't have to use Mono though, you can use any editor.

In fact, Visual Studio has first-class support for Unity now, since MS bought the company that made UnityVS and released it as a free VS extension.

I really don't think I could recommend using Unity for a non-game app, though, at least in most cases. It would be a subpar experience for both the developer and the user.