With GWenerator you can design Graphical User Interfaces with various existing software like Visual Studio or the free ResEdit ( http://resedit.net), and program Windows applications in Ada using the GWindows object-oriented library.
GWenerator produces Ada sources corresponding to dialogs and menus, as a background task, as soon as a new design has been saved. On request, it produces also a test application with all dialogs. Optionally, it launches a new Ada build, automatically or on request.
You can read the full release announcement here.