 Husks drop 0-2 sand on death. If they are on fire, they will drop red sand. Otherwise they will drop yellow sand.

 Polar bears drop 0-2 packed ice on death. This has the same drop chance as salmon.

 If a polar bear is on fire when it dies, any fish or salmon it drops will be cooked

 Zombies and Husks have a chance to drop beertoots if a player kills them, with the same drop chance as dropping a carrot, potato or iron ingot.

 If an iron golem is killed by a player while on fire, it is guarenteed to drop two pieces of obsidian. Use this to reach the nether.

 Witches have a chance to drop splash potions of weakness if killed by the player. The chance of the same as getting a carrot from a zombie. Use this to reach the end.

 Iron golems will occasionally drop any of the two-high flowers (peonies, sunflowers, rose bushes and lilacs) instead of poppies. Poppies are 10 times rarer than the other drops.

 Squids drop prismarine crystals, clay balls and prismarine shards. Prismarine shards are 2.5x rarer than ink sacs, while prismarine crystals and clay are 5 times rarer.

 Spiders and cave spiders drop cobwebs if killed by a player. (0.025%, or four times as likely as getting a potato from a zombie)

 When fishing, you can receive a sponge as treasure. These are five times as rare as other forms of treasure (books, bows, nametags, etc). You can also receive iron/gold horse armor (5x as rare), diamond horse armor (10x as rare), enchanted golden apples (10x as rare), and totems of undying (10x as rare).

 When fishing, you can get 1-4 clay balls, mycelium or podzol as junk

 Mooshrooms drop mycelium 25% of the time

 Endermites drop all flavors of silverfish infested blocks, and rarely drop shulker shells and dragon heads.

 Silverfish drop iron nuggets, and can very rarely drop ores (the kind you can pick up with silk touch)

 Ocelots have a rare chance to drop cocoa beans. This is as rare as carrots are from zombies, but a player doesn't have to get the kill

 Rabbits have a 10% chance of dropping a sapling (any kind), tall grass, double tall grass or ferns.

 Zombie villagers drop emeralds instead of iron ingots

 Zombie pigmen drop netherrack

 Ghasts drop soul sand

 Blazes drop quartz, and rarely, quartz ore