SFML - SFML provides a simple interface to the various components of your PC, to ease the development of games and multimedia applications. It is composed of five modules: system, window, graphics, audio and network.

Qt - Powerful, flexible and easy to use, Qt will help you not only meet your tight deadline, but also reduce the maintainable code by an astonishing percentage.

SDL - Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level...

GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.

raylib - Cross-platform, open-source game development library in C.

wxWidgets - wxWidgets: Cross-Platform GUI Library