Killsound packages allow you to customize the global sound played when you kill another player! Equip them by using /killsound in game.

The Menagerie package includes:

Bat Squeak (Common)
Cat Hiss (Common)
Creeper Death (Common)
Donkey Bray (Common)
Fox Screech (Common)
Llama Spit (Common)
Moo (Common)
Parrot Wither (Common)
Puffer Puff (Common)
Skeleton Rattle (Common)
Villager 'No' (Common)
Villager Death (Common)
Zombie Groan (Common)