While looking into Vlue's Advanced Recipe Crafting script, specifically the crafting categories, a stray memory happened to pop into place. Sometime just after the Y2K rollover, while looking around the 'net for game-making tutorials, I came across a gamedev.net article which listed some things to be usable in a potential game.
The article featured an assortment of craftsmen, merchants, and resources that might be found in a fantasy/medieval-inspired game. Albeit, most games even in RPG Maker might not ever become so complex as to use most or all of these, but I submit the link for those so inclined -- if even only so that a wider variety of "craftables" can be added to a game, if fitting thematically.
I found the old article by looking back into GameDev's archives:
http://archive.gamedev.net/archive/reference/articles/article250.html
It is no less interesting a read, as it was the day I first found it. And further, just up in the parent subforum, are a few other articles which may also be of interest:
http://archive.gamedev.net/archive/reference/listc2bf.html?categoryid=63
Hope this helps with your crafting-related creativity. Feel free to add further thoughts here. (I had at one point re-typed and re-formatted that list, adding in a few more ideas of mine, in an OpenOffice document and exported a PDF; but, I'll be danged if I cannot find the crazy thing....)