During my early years of programming in the 90s, every application needs to be coded manually and UI is text in appearance, programmers are limited to make UI out from combination of ASCII based characters. There are some attempts to make coding much simplier or at least much faster, one such RAD tool that exist is called Layout, it's the first WYSIWYG studio at that time, that could create true graphical UI and could run from DOS (has it's own graphics engine, and doesn't need windows OS).
Layout was the first 4th generation language at that time. Imagine, you could create an application without a single coding effort, by just creating a flowchart and specifying the flow of the application by connecting lines to each and every box, each box represents a functionality, and the source code will be generated for you in either Basic, C++ or Pascal. This is similar to Windows Workflow Foundation of .NET framework, but less complicated. I created a simple app that I named Food Costing for storing/creating a list of recipies, and computes capital and retail cost in no time, even converted a Clipper based IT Applicant Exam in just 2 days. There was one another contender called Magic but these didn't last long.