Data Packs for Minecraft Java
Browse 1,435 free data packs for Minecraft Java — popular picks include Biome Bound Blocks, LucidLightBlocks, Better Chorus Trees.
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Biome Bound Blocks
Certain building blocks can only be placed in their native biome, encouraging architectural harmony with the environment.
LucidLightBlocks
Adds 3 shapeless recipes to the game to enable crafting of light blocks in survival.

Better Chorus Trees
Improvements to Chorus trees that can impact farms and end agriculture :D
Improved Potions
Not the biggest project, the main goal of which is to improve the mechanics of brewing potions in the game. New tools, items, potions, and cauldron brewing.
Enhanced Beacons [Performance Version]
A visual Datapack for the Beacons to make them more interesting. [NEW Beacon Visuals & Player Buff Visuals]
Structures Addition
Datapack adding some small structures
Jschlatt's Christmas Music Discs
Adds jschlatt's Christmas album "A Very 1999 Christmas" to the game as music discs.
Tweakable Sulfur Cubes
Enlarge, Shrink and Give Permanent Effects to your Sulfur Cube
DyeableConcrete
A datapack that allows you to dye white concrete and white concrete powder the same way you dye white wool.
Painting Cutting
Pick and choose paintings with the Stonecutter!
Icewind
Icewind is a datapack&resourcepack/mod based on temperature and a lot of more details that make the game immersive.
Sky Island
"Lighten up the end with this pack." Retextures and slightly alters The End into a divinely themed dimension.
WebDisplays REMASTER Crafts
A datapack that adds crafts to the “WebDisplays REMASTER” mod, which is a bit poorly made
Easy Rope Ladders! (DropLadder)
Easily make Rope Ladders since 1.17!
Useful Name Tags
Adds multiple uses for name tags!
Unlit Fires
Adds an unlit state to campfire items, making them more realistic.
Slime's Gallery: Scrapped Catalogue
This was an addon to Slime's Gallery which added removed/scrapped content.

Datapack Cold World
Makes it possible for snow to fall everywhere, in all biomes without changing their basic functions, and also freezes all the water on the surface.
Fancier Mansions
Gives Woodland Mansions an upgraded look while keeping the vanilla gameplay features.
EVE - Entity Visualization Editor
The best editor text_display and item_display for survival and creativity
Qrazy Target Dummy
Minecraft Dungeons Target Dummies in vanilla Minecraft
Mojivational Posters
Motivational Posters from the Minecraft Youtube Channel
Craftable Wither Skull
Wither Skull Craft
Dynamic Player Particles
Generates more particles to make the player feel more alive.
Let Me Enchant
Lets bookshelves power enchanting tables through more blocks
Alex's Caves X Woodworks Compat Datapack
Swaps out the generic Chests/Ladders in AC Structures for their Woodworks Pewen/Thornwood Versions using Every Compat.
Moose Gen
Moose Gen is an overworld biome overhaul made by a Moose, focused on playability with a touch of whimsy.
Botw Ruined Guardians
Adds naturally generating ruined guardians (from Botw) to your Minecraft world!

Farmable Ancient Seeds
Makes torchflowers and pitcher plants seeds craftable using the plant and bonemeal.
No Bushes :(
Removes bushes from world generation.
Mineable Reinforced Deepslate
Lets you mine reinforced deepslate

Craftable Froglight
Allows you to craft froglights using a shroomlight, slimeballs and magma cream
Ancar's Mailboxes
Want a unique mailbox for friends to leave you messages and items? Mailboxes are easy to craft, auto-insert or teleport items underground, are simple to break and reuse. No ressource pack.
"Townfall" - Dungeon in the sky
Data pack roguelike sky dungeon
Aeronautics mass for SAB
Datapack. Applies masses from Create:Aeronautics to blocks from Steel Armor Blocks
RadioSign
Link signs' text accross distances and dimensions, wirelessly!