Data Packs for Minecraft Java
Browse 67 free data packs for Minecraft Java — popular picks include Farmable Ancient Seeds, Caveat, mc mod #5830536.
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Farmable Ancient Seeds
Makes torchflowers and pitcher plants seeds craftable using the plant and bonemeal.
Caveat
More options for entity behavior
mc mod #5830536
A small datapack meant for small casual worlds with some custom items, some changed/new game mechanics, and more. Hell.

Seafood Boil
Makes the Nautilus edible! (And mollusks huntable)
Randomized Suspicious Stews
Suspicious stews are randomized for every worlds.
Fryed Eggs
Fried eggs is a Datapack that adds different ways to cook eggs and other dishes that are usually eaten for breakfast
Sugar doubles
A recreation of the datapack used in NewKiddo’s “sugar doubles” series
No Hunger from Eating Rotten Flesh
Clears the hunger effect you get from consuming rotten flesh. nohferf.
Ry's Notch Apple
Reintroduces the classic Notch Apple / Enchanted Golden Apple original crafting recipe.
Tropical Fish Are Poisonous!│熱帶魚有毒!
Don’t eat tropical fish, it will cause poisoning!│不要吃熱帶魚,會中毒!
Hallucinogenic Mushrooms
Minecraft Datapack that implements hallucinogenic mushrooms (magic visuals)
Everything Edible
Makes every block and item edible by adding sugar to it!
Edible Ores
Craft ores that you can eat, Yummers!
Blocked In Hardcore
A challenging version of the Blocked In datapack
Discreet Branches
A datapack that affects the generation of the world, entities, recipes, items and dangers in a very different way from the Vanilla game.
The Foxcraft Datapack
The Official Foxcraft Datapack, originally made for the Foxcraft SMP by Alisa Puffinetta, now available for standalone download :]

Overachiever
500+ Achievements, You're gonna need a bigger screen

Bullfrog origin
This Data-Pack adds the bullfrog origin ALL THE POWERS: Blulky Legs: you take no fall dmg and jump 2 blocks poison damage: you take more dmg when you have poison Sturdy Skin: you take less dmg like the shulk origin Unwieldy: you cant use a shield
RandEffects
A datapack that adds permanent random effects to all server members from a list of effects
Rat Boots
Adds rat boots (what a surprise) that give certain perks when worn
mace trol mod
mace = dirt use it to trol youre friends thats all and idk, this is a datapack so learn to install that!
Vegetarian - Challenge
This datapack makes eating meat bad and gives you bad effects to make you a vegetarian. I bet you won't survive this one tho.
ViOres
A complete overhaul of metallurgy! Vanilla furnaces are disabled. Smelt and forge unique alloys (bronze, steel, titanium) using campfires and cauldrons, complete with immersive sounds, particles, and custom mechanics.
Survival+
Survival+ is a datapack that adds difficulty and suprise to Minecraft again. By adding tougher enemies and cool unique items. Along with a bunch of new mechanics and reworks of some old ones, causing you to relearn Minecraft in a whole new way!

Minecraft, but it hates you!
This is a datapack full of trolls, explosions and much more than meets the eye
Chemgdwow's Craftable Enchanted Apples
Makes Enchanted Golden Apples Craftable
It's All Food
Turn your entire world into edible... and eat it away!
Craftable Overpowered!
brings back the recipe & achievement for Enchanted Golden Apples
Infinite Gluttony
Eat EVERYTHING and anything!

PumpSquash's No Hunger Data Pack
Makes it so you have infinite saturation. You need to be at full hunger for the data pack to work. If you could give tips on how to add food regeneration(like in beta Minecraft), that would be great
PotatCraft
PotatCraft makes the humble potato, an oftentimes overlooked item, into a vital and useful item, without which the player may not progress.