Chickens drop 0-2 feathers, 1 raw chicken and 1 cooked chicken if killed by fire.
Cows drop 0-2 pieces of leather, 0-2 raw beef and 0-2 steak if killed by fire.
Pigs drop 0-2 raw porkchops and 0-3 cooked porkchops if killed by fire.
Sheep drop 1 wool when killed, and 1-3 wool when sheared.
Mooshrooms drop 0-3 mushrooms when sheared, one bowl of mushroom soup when milked, 1-3 raw beef and 0-3 leather when killed.
Villagers drop nothing.
Bats drop nothing.
Rabbits drop 0–1 rabbit hide, 0–1 raw rabbit and 0-1 rabbit foot when killed.
Horses drop 0-2 leather when killed.
Endermen currently drop nothing, if not holding a block. However, they drop ender pearls in other versions of Minecraft.
Spiders and Cave Spiders drop 0-2 string and 0-1 spider eyes.
Wolves drop nothing.
Creepers drop 0-2 gunpowder.
Silverfish drop nothing.
Skeletons drop 0-2 arrows, 0-2 bones.
Slimes drop 0-2 Slimeballs.
Zombies drop 0-1 iron ingots, 0-1 potatoes/carrots and 0-2 rotten flesh.
Zombie Pigmen drop 0-2 golden nuggets, 0-1 gold ingots, 0-2 rotten flesh.
Blazes drop 0-1 blaze rods.
Ghasts drop 0-1 ghast tears and 0-2 gunpowder.
Witches drop 0-1 Stick, 0-1 Glowstone, 0-1 Redstone, 0-1 Nether Wart and 0-1 Spider Eye, drop potions as equipment drop.
Skeletons, Zombies, and their Nether variants can spawn with equipment, (usually leather, chain, or gold) and have an 8.5 percent chance to drop each piece. They are more likely to spawn with items in Hard mode, or a full moon.
Iron Golems drop 3-5 iron ingots and 0-2 poppies. His drops aren't affected by Looting enchantment