Minecraft Java 1.21 Mods
Browse 12,329 free mods for Minecraft Java 1.21 — popular picks include Anti-Dolphin Plugin, EvenIronGolemsRust, Scales mobs.
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Anti-Dolphin Plugin
This plugin stops all dolphins from spawning in your world to prevent water running
EvenIronGolemsRust
Even iron golems rust if they sink. A lightweight plugin that adds corrosion damage to underwater iron golems. (アイアンゴーレムだって、沈めば錆びる。水中の鉄ゴーレムに腐食ダメージを追加する軽量プラグイン。)
Scales mobs
Would you like Minecraft mobs to be different sizes
Cobweb craftable
This datapack add craft for cobweb with strings
⭐ [1.21 – 26.2] ShieldRising | RPG Shield Progression & Ability System
Block mobs, absorb their power and unlock evolving shield abilities with a full RPG progression syst
Revenge of the COWS!
If you kill a cow you die... It's a bit random isnt it...
PrivateMobs | ¡Per Player Entities!
A light-weight plugin that allows you to spawn per-player entities
spooky and cookies
Ghosts and cookies in one place—free the spirit of terror and enjoy a wide variety of cosmetics.
orcinvasion
Added a lot of unique orcs and goblins, along with an exoskeleton system and NPCs with smart and dynamic systems.
GodMineYT's Siren Head mod
GodMineYT's Siren Head mod - Absolute new Siren-Head mod. This mod adds the legendary Siren-Head, created by Trevor Henderson. Mod created by GodMineYT, with Mcreator.
Random Scale
Randomizes the scale of most creatures within the world. Who doesn't love variety?
Enderman Spawns
This is a very customisable plugin where you can easily change the number/percent of enderman that spawn
RandomChestSpawner
Bring your server to life with Random Chest Spawner, the perfect plugin for creating exciting loot events that keep players exploring, competing, and coming back for more.
Zenitsu Pikachu
This Pack adds a Zenitsu cosmetic for Pikachu
Kill Shrink
Killing a mob will make you smaller in size as well as eating golden apples will increase your player's size

TrackTrade
A mod that simplifies trading with villagers.
half-stats
Halves all 41 player attributes in Minecraft — half health, half damage, half speed, and more. Mobs and armor stands are unaffected.
Rideable mobs
Rideable Mobs - Ride any mob with WASD, jump and shift controls
Exto
This mod adds a unique horror mod boss that has a rare chance of spawning in the dark forest, the badlands etc.
QuietManhunt
Competitive Manhunt plugin for Paper 1.20.1+ Features a ban phase, automatic plains village finder, cross-dimension compass tracking, and headstart countdown.
MH4 pack
changes mobs to players in minehield
Dragonfight Updated
This datapack is an improvement of the dragon fight. With a new mini-boss and even more.
Mobarmy Battles
This is a Fan made Mob Army Battle Plugin
Fix Mob Ai Tweaks Tags!
A simple datapack that acts to fix Mob Ai Tweak's treasure tags as Issue #229
MC Costumes
A simple datapack that allows disguising as animals
KyuTweaks
"Slight" Tweaks and Additions for vanilla survival.
Limit Portal Farms
Limits overly efficient Minecraft farms without blocking normal mob transportation and other stuffs.
Zaoneblock
A plugin for playing sounds, messages, and commands on block break, mob kill, and fishing events.

Resource Bees
Adds resource bees that help you gather ores automatically!
Bugaton
Mod that currently adds one creature, along with a bunch of stuff to accompany it.
OlEncounters
Create cinematic, fully configurable world encounters with animated schematics, MythicMobs waves, custom loot, automatic spawning, and safe rollback.
Axolotls aren't cute anymore
This texture pack makes the cutest mob-axolotls a bit scarier
Monster Energy Pack
Monster Energy Pack is a resource pack that adds 11 types of real-life Monster energy drinks to the game
EndVillager profession
Adds a simple new villager profession with end based trades, uses endchest for profession.
PatsPets
Powerful GUI based Pet plugin with levels,buffs and fights.
MobChunkChallenge
Fight a random mob in every chunk before you can continue your adventure.