1. Xtd formsModern c++17 library to create native gui for Microsoft Windows, Apple macOS and Linux.
4. xtdFree open-source modern C++17 / C++20 framework to create console, forms (GUI like WinForms) and unit test applications on Microsoft Windows, Apple macOS and Linux.
5. Examples QtShows how to use Qt widgets only by programming code (c++17).
6. Examples FLTKShows how to use Fltk controls only by programming code (c++17).