Several open source Graphics interface library (GUI libraries)

smartwin++

The C + + GUI library, which follows the BSD license agreement, is built on top of the Windows API, but can still be used on Linux/xnix by using Winelib. also supports Pocket PCs and Windows CE-based applications ...

Xclass

The Xclass library is a C + + GUI toolkit in the X Windows environment. It is based on Xlib, consisting of a set of components, ranging from simple components to complex, which also includes many commonly used dialog boxes. Component has MS Windows appearance style.

windows++

Windows++ is a lightweight C + + application framework that allows you to use windows in your C + + program

FOX

Fox is a C + + development graphical user interface library, a convenient and efficient basic toolkit.

V C + + GUI framework

V is a free portable C + + graphical user interface framework designed to develop applications on various graphical interface platforms.

WxWidgets

An open source C + + GUI framework that makes cross-platform programming easier.

Gtkada

A complete graphics toolkit for ADA95

FLTK

The FLTK is a cross-platform C + + GUI toolkit for Unix/linux (X11), which supports Microsoft Windows and MacOS X

Lesstif

Lesstif is the osf/motif version of the Hungry programmer.

Open Motif

Open motif is a graphics library in UNIX environment

Microwindows

Microwindows is an open source project designed to use the capabilities of Modern graphics window environments on small devices and platforms.