ctkrocks

Meerkats and oases in the desert.

Use the sniffer to locate biomes.

Use copper to craft horseshoes to upgrade your horse's speed and jump.

Use an Echo Shard to upgrade a Goat Horn to perform sonic boom attacks

Locate vibrations through walls with an Echo Shard Spyglass

Use trial keys to lock chests, doors, etc.

Use ender chests with hoppers.

Fill copper grates with water to create pipes

Use copper to create tools and armor that change stats as they oxidize.

Use the creaking heart with different blocks to change the biome.

Adds an Echo Shard trim to armor via the Smithing Table.

Upgrades to make decorated pots more useful.

Adds a Nautilus mob that hides in suspicious gravel underwater.

Adds the Big Beak (a large ride-able bird), and the Hungry Dripleaf (a carnivorous plant).

Paint, brush your pets, remove moss, farm string, and more with brushes.

Use a lightning rod to create a Copper Mace with a lightning attack.

6 new arrows and bows craftable in the fletching table.

Create Echo Shards by having an Allay holding an Amethyst Shard get hit by a Warden's sonic boom.

Transport villagers with llamas by giving them the lead.