> but you didn't elaborate on your preference... To be honest, I did! As I said above, my preference are: - Qt (for C++ apps) N.B. Only Qt, not KDE Framework

> but you didn't elaborate on your preference... To be honest, I did! As I said above, my preference are: - Qt (for C++ apps) N.B. Only Qt, not KDE Frameworks. - PyQt/QtPy/PySide2/Tkinter (for Python apps) - Xlib + custom widget sets (for C apps) I'm involved in few Qt/C++ and Xlib/C projects, but for my personal needs PyQt & Tkinter is enough. Also I use some 3rd-party GTK2/GTk+3 (GIMP, Inkscape, LibreOffice), but actually trying find its Qt alternatives as well (and there are NO place for Electron apps on my PC). Additionally: - SDL 1.x* also may be useful for C apps, due to its high portability; SDL2 is less portable. - OpenGL (for C++/C/Python apps) - wxWidgets (for C++/C/Python apps)