Marinas-GUI is a full environment to make multiplatform applications in graphics mode using Harbour compiler and Qt library. It run in all platforms supported by Harbour and Qt.
wxHarbour is a set of Harbour language bindings for wxWidgets. Providing a portable multi-platform GUI toolkit for Harbour (a 100% Clipper & xBase compatible compiler).
qtHarbour is a set of Harbour language bindings for Qt. Providing a portable multi-platform GUI toolkit for Harbour (a 100% Clipper & xBase compatible compiler).