Writing web apps may seem like the only thing people do lately, but it's not. Given a choice of a number of languages and runtimes available 5 years ago for example, .net/mono was a perfect choice for a daemon dispatching jobs to a number of usb dongles where having a good ffi (p/invoke), nice io abstraction, async actions and database interface was important.

This is something you write from scratch. No big frameworks are involved. If I ever find I need MVC.net, I'll probably go with a completely different language.