One of Wendell Berry's best and most famous essays is "Why I Am Not Going to Buy a Computer". He discussed how he writes in pencil and his wife types it up. He got a lot of grief for that, mostly people (wrongly) assumed that he was making wifey do the grunt work. In his follow-up essay, "Feminism, the Body, and the Machine" (both essays are available in the book What Are People For?), he had the great line, "I am aware that it is not possible to construct a public defense of a private life." He's right--you'll always come off either as making excuses and/or trashing your spouse. Rod, of course, seems not to get this. As you note, he continues to trash other people for their choices; and he's even indirectly trashed is wife and mother-in-law; and yet he still tries to publicly defend his private life. He could learn a lot from Berry.
The only thing I've found is not a "tool," per se, but Amazon uses a kind of BISAC code in its listings.
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However, be advised that they are not 100% accurate.