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
A 64-bit clean (hopefully!), portable, object oriented library of tightly integrated low-level classes, templates and functions targetting realtime multithreaded applications such as midi sequencers, audio synthesisers, games and simulations.
NUSoftware Game Engine is a framework used for games development. A simple API to easily create games using advanced 3D graphics & sound systems simplified for the average programmer.