LlamaBlocks is a complex, multi-year long development, MCreator mod which adds a ton of features. These include 702 variants of custom building blocks, the complex Computer block with a calculator and much more, a password system for improved game-immersion, many custom storage items, a custom Banana farming item with some cool gimmicks, a custom damaging fluid named Acid, and more!

There are Custom Bricks and "Large Tiles" added in LlamaBlocks. Both come in 19 colors: all 16 vanilla colors (White, Light Gray, Gray, Black, Brown, Red, Orange, Yellow, Lime, Green, Cyan, Light Blue, Blue, Purple, Magenta, Pink), plus Industrial (Netherite-colored), Cherry (hot pink), and Teal variants. On top of that, every Brick and Large Tile has a cracked equivalent.
There are also Tiles (Black and White) and Ceiling Tiles (Blue and Light Gray).
Each color variant or tile type has a corresponding block set, which includes the following: full block, stair, slab, wall, fence, fence gate, trapdoor, pressure plate, and button.

The banana is a somewhat basic food item in terms of nutrition, but you can eat them very fast. Banana Plants naturally generate in Banana Patches.
When you surround a Banana with 8 gold in a crafting table, you get a Golden Banana. These have more saturation and hunger restoration, give you regeneration for a split second (just enough for you to heal once), and grant the Luck effect for 45 seconds after eating.
This is a naturally spawning plant that works similarly to something like sugar cane, but it grows 5 blocks high, can be bonemealed, and drops a combination of Bananas, Banana Plants, and bonemeal.
Farm Scraps are non-plantable items that can be used to duplicate some seeds, be composted, and be crafted into brown dye.

Acid is a fluid that naturally generates in Acid Lakes in the Outer End Islands and can be accessed in the Creative menu. When you step into acid, it damages you instantly, similar to lava. However, it's not based on fire and has a custom damage system.

Backpacks are items that store items like a chest, but are kept in your inventory instead of being placed as a block.
This is the cheaper-to-craft, but less functional, variant of the backpack. It can store 3 rows of items, but that's pretty much it.
The Netherite Backpack is an upgrade to the Backpack which:
This is a block that, when a neighboring block is updated, sets its light level to the maximum redstone power being input into it.

This is like a barrel, but:

The Secure Storage Block, Computer, and Authenticator all support passwords. By default, the password is blank. When there is no password set yet, the Computer and Secure Storage Block skip the password screen, but the Authenticator instead requires the user to leave the password field blank. The user can change passwords using the Password Changer, though they need to enter the existing password.
More specifically, passwords are stored in an NBT text tag named
access_password, which can be easily viewed using the vanilla/datacommand.

This asks for a password using the Password System and, if successful, gives a redstone pulse for 0.75 seconds.
The Computer offers a variety of features for information, math, player management, and more. This includes a calculator, a player messaging system, a redstone output slider, formatted in-game time display, and a list of players.
