1991: High Screen 5 app prototyping tool
During 1990-1991 I was developing for PCSoft HighScreen 5, a tool to make apps.
I was specifically in charge of HSMaquet, the app prototyping tool: 100% interactive, this interface builder was used by developers to speed up their app. They were creating the whole app screens and controllers and were able to link them with no additional code.
HSMaquet was able to generate the code to more than 20 languages, including Fortran, Cobol, Turbo Pascal, Microsoft Basic, etc. The developer could compile and link and demo his app to his customer within days.
I have found the ads in an old magazine: