J1181-0 is a modular visual interface for Harbour. It provides a feature-rich user interface that is optimized for the Harbour language. Features include multi-window support, customizable windows, drag-and-drop support for objects, graphical menus and dialogs, support for various input devices including the mouse, keyboard and joystick, and audio and video support. J1181-0 also offers an integrated debugger, built-in help, and support for dynamic HTML pages.