One of them was METHOD/1 from Andersen Consulting (now Accenture). If you wanted to create a variable to hold, for example, a part number... you'd create an entry in the CASE tool for it and from then on, everyone was supposed to use that one. It would have validation rules, like 30 characters, alphanumeric, whatever.
The CASE tool would do code generation for screens and forms and whatnot. And.... that's about as much as I remember at the moment.