[aspeckt112]

Avalonia.

The UI isn't native, is a Skia canvass with drawn controls. But it'll work on basically every OS and it's pretty good.

Also, you're not writing JavaScript, so that's a win any day in my book.

[mixmastamyk]

Sounds like Flutter?

[register]

No it's way better than Flutter. Avalonia really works on desktop.. :). Also the model is WPF so whoever know a little bit of legacy .NET framework will be able to write Avalonia apps in no-time