Zombies drop feather/rotten flesh/potato/carrot/enchanted armour and weapons.
Skeletons drop bow/arrow/enchanted armour and weapons.
Spiders drop spider eye/string.
Cave spiders drop is same as spiders.
Endermen drop ender pearl.
Zombie pigmen drop golden swords/gold nuggets.
Wither skeleton drop wither skulls.
Ghasts drop ghast tear.
Blazes drop blaze rod.
Enderdragon drop dragon egg.
Wither drop nether star.
Witches drop random stuff (stick/string/potions)
