Minecraft Java 1.21 Mods
Browse 3,671 free mods for Minecraft Java 1.21 — popular picks include Everyone baby, Balanced Iron Farms, Baby Pets.
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Everyone baby
A datapack that makes all mobs become a baby, even those that can't in the basegame. Use this datapack if you want the cutest experience :D.
Balanced Iron Farms
Rebalance Minecraft's overpowered iron farms. Part of the Balanced Minecraft project.
Baby Pets
BEST BABY PET PLUGIN EVER! With a whole GUI full of pets you can pick from some small some big pick your poison, and fall in love. Custom names and more!

Stardust bunny
Adds the stardust bunny origin. Balanced, mobility-focused origin with a huge arsenal of utilities.
Overhauled Horde Spawn Engine
The ultimate configurable horde spawning engine for Minecraft
Project Tiger
This is a light weight w.i.p mod with new buildings and blocks

OneEmeraldTrades
A plugin to make all trades with villagers cose one emerald.
Toxin Accumulation│毒素堆積
Bogged's arrows now inflict a more deadly poison.│現在沼骸射出的箭矢會造成更致命的劇毒。

Pumpkin Madness
One new biome, "Pumpkin Grove", which contains secrets, but what are they? So figure this out, I won't give you any hints, but this biome will make you come back again! )
Better Damage to Golems
This is my first mod! This mod is a way to get more accurate damage to golems into Minecraft via increasing the damage dealt to golems using a pickaxe whilst taking efficiency into account. This mod was inspired by the game Muck By Dani.
I want a horse
Get a tamed horse with saddle and lead on your first login. Supports Horseman mod for the copper horn. Fully configurable
Items, Crafts & World of the Realms of Runeterra
This project introduces all the items, blocks, abilities and other gameplay mechanics not related to the world generation provided by the Core Package of Realms of Runeterra: A Tale of Relative Dimensions
Pacify Mobs
A datapack that works just like Silence Mobs but to remove their AI
Mob scale randomizer
Randomizes mob scale
Warriors
You can get new friends that fight for you
Snowball on a Stick
Adds an item that increases the movement speed of Happy Ghasts.
Better Trap Horse│更好的陷阱馬
Zombie Trap Horses can also spawn in Lightning, and Trap Horses can be triggered by any mob.│殭屍陷阱馬也可以在閃電中生成,陷阱馬可以被任何生物觸發。
Rage twist
A simple datapack that adds a ragebar that can be increased by attacking mobs and that makes your attack damage increase.
MobHat
Ever felt like your head was missing something? MobHat is a fun and lightweight plugin that lets you wear almost any creature in Minecraft as a hat!
Skull's Mega Expansion [Cobblemon-MSD]
A Cobblemon Mega Showdown datapack that adds a plethora of custom Mega Evolutions designed by me, Skull :)
More Realism (MR)
This project helps you experience your world more realistically.
Something Watches 2.0
A slow-burn horror mod that transforms your world into a paranoia-inducing nightmare. Featuring custom entities, random horror events, creepy signs, screen glitches, a horror dimension, and admin troll commands. Something is always watching.
Sword4000: HungerGames
Sword4000: HungerGames is a 1.8-1.21.11 professional-grade server plugin designed to recreate the high-stakes, action-packed custom Hunger Games events exactually like the Hungergames made by Sword4000. Built using a clean, multi-module abstraction.
SpaceFrog's Pet Tadpoles
Fulfill your dream of having a pet tadpole! You can even attach leads and keep them as young tadpoles forever! Take them on a walk and bond, but make sure to follow local leash laws :]
Buff Banners
Hostile mobs can spawn with Buff Banners that grant combat buffs.
ChallengeAdvancements
Turn Minecraft into a dynamic advancement challenge! Players get random goals, track progress on a scoreboard, and compete to complete all challenges.

Sender's Return Policy
A mod that allows you to specify which items/projectiles can reflect redirect-able projectiles such as Ghast fireballs and Breeze wind charges.
Vyn's Clones
Conjure perfect self-reflections that can aid your journey
A Dolphin Ride
I got a little bored, so I decided to develop a plugin that would allow you to ride a dolphin and ride it for your server... everyone loved it so much that now I've posted it here :) 🐬🌊🥳
Warrior Expansion Mod
It adds new fighting mobs to the game
Rob&Peace
Robbing mob items instead of attacking
Mobs patch for vampirism
You need mutant monsters by the moment. Fixed behaviour for stray, husk and mutant monsters using mixin
Breached (Standalone)
Breached is a competitive Minecraft survival mod inspired by Rust, built for players who enjoy looting, PvP, raiding, and base-building. It keeps much of Minecraft’s core survival identity, but adds unique systems that force raiding/basing/PVP.
Debuff Zones
Adds a softer alternative/add-on to the vanilla worldborder system.
Harmony I
A seamless and enjoyable modpack that transforms Minecraft with well-balanced development, fresh mobs, and mechanisms. Bronze progression, explore structures, complete quests, and dive into a world where every mod tastes like vanilla.
Dupes Returned
A simple gui menu to toggle sand, tnt, carpet, rails dupes on paper servers, With customizable limits