Eto is very interesting but unfortunately there seems to be just 1 (very active) developer behind it, from what I can see.<p>On the other hand, Xamarin.Forms had an announcement recently, an announcement that Hacker News missed. I submitted the news a few days ago but it didn't reach the first page:<p><a href="https://news.ycombinator.com/item?id=14383467" rel="nofollow">https://news.ycombinator.com/item?id=14383467</a> -><p><a href="https://blog.xamarin.com/glimpse-future-xamarin-forms-3-0/" rel="nofollow">https://blog.xamarin.com/glimpse-future-xamarin-forms-3-0/</a><p>TL;DR:<p>Xamarin.Forms will support desktop environments:<p>- Windows (WPF)<p>- MacOS (Cocoa)<p>- Linux (GTK#)<p>This is on top of the mobile bits: iOS, Android, UWP.<p>As an added bonus, they've added Xamarin.Forms embedding into native interfaces.<p>It's actually major news since Xamarin.Forms would become the first cross platform UI toolkit that:<p>1. supports both desktop and mobiles<p>2. is backed by a major vendor<p>3. is truly usable from a memory managed language as part of the core offering