I can only say this from the context of an Inform programmer in general, and I’m looking mostly from a parser-game standpoint. And I may have a gross misunderstanding of what you mean by “tools.”
I would like a tool that would be able to see all subjects you can talk about with a person, or (with all the people in the game) about a subject. This may be a trivial extension to Juhana’s Object Response Tests–I don’t know. But I want to put more interactive dialogue in my games & it’s always a hassle to ASK X ABOUT THING 1 … ASK X ABOUT THING 17 & even just planning this is intimidating.
This may be covered in some other Inform testing modules, too, but I wasn’t Inform-literate/persistent enough to wangle it. I’ve had to homebrew it for my games, which isn’t too bad in I7, but it’s one more hoop to jump through.
However, I think this would generally be good for any work where you have a lot to ask about, or with any programming system.
I think it’d be nice to be able to have a dashboard on top with a list of popular often-used verbs. You could tab through them and maybe even make them customizable, or maybe use F1-F12. They would put words on the parser command line. You could maybe even have a separate window for popular nouns. I am thinking of something like what Quest has, only a bit more in-depth. Stuff like maybe mapping the numpad to custom directions would be nice, too. E.g. 3 would send the NE(enter) keystrokes.
I have no clue if this is remotely practical or doable for Inform, or for having Windows/Mac/iPhone compatibility, but I hope it at least spurs ideas.
Obviously Twine lets you tab through options (and it’d be awesome if Twine could allow for this in separate windows in the future, or if it already does,) but I think having a separate window of common verbs would be convenient for old-time players and also let new players know what is most useful.
While I’m a huge fan of the parser, I’m starting to recognize having some middle ground between point-and-click and the parser so people can use both as needed.