Have any applications developers here used wxWidgets? It is a newer alternative to GTK and QT, which is described in their FAQ as follows:
What is wxWidgets?
wxWidgets is a class library that allows you to compile graphical C++ programs on a range of different platforms. wxWidgets defines a common API across platforms, but uses the native graphical user interface (GUI) on each platform, so your program will take on the native ‘look and feel’ that users are familiar with.
There’s also a Rust binding for it.
Looking like a native app is a big plus and cross-platform is a big plus. My concern then would be with how it compares in the performance of apps that it produces, and its ease of use.
EDIT: I see that it’s been around since 1992, beginning life as an academic project, so it can’t be said to be “newer” than those other two. Still, it appears to be in current development.