Gammasoft
xtd
Free open-source modern C++17 / C++20 framework to create console, GUI (forms like WinForms) and unit test applications and libraries on Microsoft Windows, Apple macOS and Linux.
Examples_wxWidgets
Shows how to use wxWidgets controls only by programming code (c++17).
Examples_Cocoa
Shows how to use macOS AppKit Cocoa controls without StoryBoard only by programming code (objective-c)
Examples_FLTK
Shows how to use Fltk controls only by programming code (c++17).
Examples_Gtkmm
Shows how to use Gtkmm controls by programming code (c++17).
Examples_Qt
Shows how to use Qt widgets only by programming code (c++17).
Examples_Win32
Shows how to use Win32 controls by programming code (c++17).
properties
another c#-like property accessor for C++11 and above.