

no player loot Mod
This mod alters the loot drop system in Minecraft - now mobs cease to drop items after death if they weren't killed by a player. The only exceptions are cases where the enemy is destroyed by the user themselves or a conditional "player proxy" (such as the slaughterer from specialized mob farm kits).
Forget about automatic drop farming that operates without your direct involvement. No more dealing with situations where zombies carry items picked up from another monster that perished from a cactus or other remote destruction mechanisms for ages. Creature trophies drop exclusively when you personally (or your tool, identified as a player) deliver the final blow.
(update 1.0.0: the restriction applies to both PvE and PvP - you gain access to loot only if you personally eliminated the opponent)