Pursuant to the discussion on dragonskin and human leather in another thread, taken here so it doesn't derail it. Can you think of some creepy but reasonable uses that a good character might not object to, for such materials? Here are two ideas.
There are, in fact, serious items made out of human skin. I'm not talking about art projects that use it to make a point, but rather real functions performed by human leather.
Being hairless, our leather is extremely fine-grained, and because we are sebaceous (we sweat), it is well-oiled. These mean that it really is extremely waterproof, so it was on rare occasions used for bookbinding. I think it's only academic folklore that some of the books thus bound were court reports, using the skin of executed murderers. I could see a very few such items in D&D having reasonably well-accepted uses:
Biography: Bound in the leather of the being's skin, the necromantic magic involved in making this tome writes on the parchment within the life history of the deceased, as they would have narrated it under repeated, detailed speak with dead spells. The more willing and aware the subject was before death, the more detailed and reliable the information.
Moderate necromancy; CL 7th; Craft Wondrous Item; speak with dead, amanuensis; Price 2,000 gp.
Executioner's Journal: When a particularly powerful villain is sentenced to death, Sigil's law enforcement knows that resurrection and reincarnation are serious problems, and so an executioner's journal is often made, bound in the skin of the felon, writ within with the details of the trial, judgment, and execution. These journals are stored in the archives of the Courts, and regularly checked by namers, for if the deceased is ever returned to life, the journal animates agitatedly, its flesh seeking to return to its former owner. When this happens, they are often targets for theft: if the journal melds with its subject, one level lost from the raising process is returned.
Those are some seriously cool ideas. Creepy, but cool. The book that tracks resurrections seems particularly important in the D&D multiverse.
How about a flute made from the bones of a famous singer, that plays in their voice? Or a piano. If they return to life, perhaps it starts murmuring their thoughts, or it just turns discordant.
Organ transplants, of course. Someone needs an organ and a now-dead person donated it.
A paintbrush made from a dead sod's hair. The images painted with it show hints of that person's afterlife.