There is one somewhere, I recall a thread about reworking the df UI, one that mentioned commands for right click menus for instance...I think it was in this forum, actually, though most UI ideas are in suggestion forum.
However, I don't think it really went anywhere maintained, successful and popular*.
Now, I do love the utilities, scripts and plugins that speed up choosing things and searching for information the most, when it comes to DF mods. Auto-material, grazers, search, stocks, job-duplicate, lot of tweaks, legends mode utilities, etc...I hear ya, k33n, even if I haven't done enough research to the extent of the imposed penalty. After all, DT makes things like finding all dwarves in two hundred who like enormous corkscrews and getting them having weaponsmithing as highest skill reasonable instead of large undertaking.
Of course, somebody has to work on DT for it to work....
*Given the size of the community, popular is bit of a misnomer - if you have an idea for improvement done through dfhack, there is a thread to suggest scripts in 3rd party utilities, but if you really want something done or to know something you'll have to do it yourself, generally - even if someone is capable and actively working on gui, they'd rather work on whatever they're busy with right now likely.
Actually, I have to say this is something of a blessing in disguise. Whenever there's a thing in DF I'm not sure about, I have learned to not speculate or ask about for most things - I go straight to conducting an experiment to test it, as it usually beats waiting a day to get an useful idea and in the end often testing anyway.