ResEdit

ResEdit is a discontinued developer tool application for the Apple Macintosh, used to create and edit resources directly in the Mac's resource fork architecture. It is an alternative to tools such as REdit, and the resource compiler Rez. For the average user, ResEdit is generally easier to use, because it uses a graphical user interface. Although it had been intended to be a developer tool, power users often use it to edit icons, menus, and other elements of an application's GUI, customizing it to their own preferences.