I'm curious: the "Script" screenshot looks like it's using standard GEM Desktop, while the "Signum" is some other desktop. Are these both for ST? Was Signum written using some other full-screen graphic environment?
There were a good number of these kinds of application back then. Steve was one, GFA Basic another.
https://ataricrypt.blogspot.com/2024/03/steve.html
An application that was more a random selection of tools than a cohesive whole but some people swore by it.