The GNAVI project provides GWindows, a Rapid Application Development framework for Graphical User Interfaces on MS Windows.
The durable Open Source answer to Delphi and Visual Basic.
Alire crate: https://alire.ada.dev/crates/gwindows
Mirror: https://github.com/zertovitch/gwindows
Gnoga uses modern web technologies to allow simple creation of cross platform GUIs for Ada with native or custom look and feels that perform on par to native toolsets locally and can be easily and securely remoted as web apps over the internet as well.
...Complex user interface elements can be realized often in few lines of code. Agar is also extensible at the low-level. The low-level API is documented such that modular drivers can be written which enable Agar applications to work seamlessly under many platforms graphics systems without any change at the application level.