Do any of these have any use apart from selling to a merchant?
(Might be too many for this to be a reasonable "question" topic but whatever, I guess...)

-Entrails
-Beak
-Pelt
-Ivory
-Mandibles
-Raptorial Leg
-Ivory Leg
-Claw

-Hammer
-Unusuable First Aid Kit
-Oil Lamp
-Broom
-Fine Cup
-Mug
-Pipe Wrench
-Fine Dining Fork
-Fine Dining Spoon

-Golden Chalice
-Chalice
-Bundle of Old World Money
-Collectable Toy Car
-Soft Toilet Paper
-Toy Car
-Toilet Paper
-Cigarette

The ones you listed I dont think have any use, just sell them for elexit, I was thinking the drop from mutants might be usefull in crafting but they are more usefull if you just sell everything you farm.

As long you use the redeemer you only need to save the red gems so you can insert a big one in the weapon, rest of the items should be sold so you can buy pure elex to make potions for attribute or exp.

Mandibles are used to make the mind changer (stim).

EDIT: entrails used to make animal lover.

I believe the list above, plus any other thing listed as "trophy" such as teeth etc. are used in crafting. While I don't know for certain, I believe every single "trophy" item has a use in at least one crafting recipe and/or weapon upgrade.

I'm basing this on looking through the crafting recipes at a workbench and most of the above (plus teeth) appeared in something (goldsmith stuff, but also the occasional potion, chem or food item, as well as weapon upgrades).

AFAIK everything in the other two lists you provided has no use except to sell to merchants.

Could you specifically list what recipe requires each?

Maybe, but to be honest that seems like too much work. ;)

That and I'm not really that far into the game - apparently I've played close to 100 hours now but still only level 21 since I get side-tracked exploring really easily (which is now more fun that I have decent weaponry). So there are probably many recipes I'm missing. Probably better to get someone who's completed the game to do this - they can just load a save close to the end and use a crafting table to get all this info.

Though I'm kind of surprised that there isn't a list of recipes out there already...

But if a recipe jumps out at me as definitely using one of those while playing and I somehow remember to write it down, I'll put it in this thread.

I did complete the game. None of these items were required in recipes that I had found.

Really?? Well then either you missed a lot of recipes - or I am completely and utterly wrong...

Though I'm certain I saw both claws and raptorial leg in a recipe...

EDIT: OK just checked and it seems like I'm wrong about claws and raptorial leg. So, it's probably safe to say if you've completed the game and haven't found recipes for any of those things in list, then they're not used for anything (not including obscure recipes you haven't found yet).

No idea why I thought raptorial leg or claw was used for something... Probably because things like bone and teeth are used, so I just assumed everything would have a use somewhere...