A team I worked on years ago had a build system with an insane number of options. Someone made a GUI that looked vaguely like this OpenSSL GUI does, only it didn't have a "Build" button, but a textbox that showed you the command line options you had picked (I think it could automatically save to a script as well).
It was such a useful tool. I've endeavored to recreate that a few times in other teams when I encounter a tool with a --help that's more than a page long. Really helps new people figure things out.
One that runs it, not so much.