Minecraft Java 1.21 Mods
Browse 3,634 free mods for Minecraft Java 1.21 — popular picks include BeeRegenPlugin, Gigeresque - Create: Northstar compatibility, Translucent Leaves.
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BeeRegenPlugin
Regenerates bees in hives that are missing them and despawns bees after a set lifespan or if lost.
Gigeresque - Create: Northstar compatibility
This Datapack adds some compatibility between Gigeresque and Create: Northstar.

Translucent Leaves
Makes all vanilla leaves completely translucent to light, preventing mob spawns and allowing crop growth under trees.
Mobs patch for vampirism
You need mutant monsters by the moment. Fixed behaviour for stray, husk and mutant monsters using mixin
Origins: Golemite
Origin datapack that adds the Golemite, an origin based on the Copper Golem.
Ultimate Companion Mod
An intelligent, customizable companion with a Gacha system, custom Meme sounds, and a Jojo-style Ghost Stand! Never adventure alone again.

Sakura Phantoms
A lightweight, high-performance plugin that adds passive Phantoms to the End dimension.
WarFmod
A mod that adds new mobs and bosses to your world, as well as new features and items.
ErelisVanilla
Datapack featuring QoL changes while keeping all of them as Vanillaish as possible
Origins: Tortugan
Origin datapack that adds the Tortugan, an origin based on the Turtle.
Lethal Breed
Adaptive predators that break through walls and build bridges.
ConvertIT
Cycle between Zombie Villager and Villager with ease!
Every Mob Has Levitation!
This mob applies levitation to every mob except the player!
Vyn's Clones
Conjure perfect self-reflections that can aid your journey

OneEmeraldTrades
A plugin to make all trades with villagers cose one emerald.
Tweaked
Tweaked adds useful Minecraft commands, admin tools, advanced gamerules, mob spawning control, inventory editing, sandbox worlds, and server management features.
SmpMechanics
BetterSleep, Custom Day/Night Time, /sit, Mob Cleaner, Block Loggin, SimpleTPA, /hat, /fly, /god, Cozy Campfire
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
No Invisibility Particles
Remove the particles when using invisibility to be truly hidden.
New Old Flowers For Sniffers
Sniffers can now dig up the removed red rose, pocket edition's blue rose and a new Bobuar rose
NoMobLoot
Prevents mobs from dropping items and experience orbs
More Breeze Rods
This project makes that a breeze now tropps more breeze rods.Very usefull
Better Pathfinding
A mod that fixes vanilla mob pathfinding bugs / 修复原版生物寻路缺陷
The Warden Scythe
This datapack add a powerful weapon but hard to get !
Portals No Pigmen
Disables Piglins spawning from Nether Portals in the overworld
DrownedOverhaul – A Deep Sea Threat Awaits
DrownedOverhaul transforms Minecraft’s oceans into a place of genuine peril. This plugin completely reimagines the behavior of Drowned mobs, turning them from passive nuisances into coordinated threats lurking beneath the waves.
Snack Sticks
Turn mobs into tasty treats!
PhantomGuard
Prevent Phantom spawns with player-specific permissions.
TNT More +
Adds new TNTs, ores, tools, armor, blocks, materials, and custom mobs to enhance your Minecraft adventure.
Biznesmod
This mod adds new biomes, a new villager proffesion, new mechanics (upgradable abilities, collecting iron dust to make iron ingots, etc...), new custom structures (10+), a TNT cannon which shoots tnt where you look and some new redstone components.
The Echo Horror
A progressive psychological horror mod that introduces strange anomalies, distant watchers, unexplained encounters, and escalating disturbances as the days pass.
Villager Job Block
This mod allows to see to which block is villager job connected.
Battle Music Crescendo
Mod that adds background music when fighting hostile mobs and players and more
Somnium Reale
Explore a new world where things aren't quite as you remember, but in some ways feel more real than ever.
Custom Hyperion
This project adds a Hyperion concept, just very different and survival friendly (not OP)...
Peaceful Life
Locks the world difficulty to Peaceful for cozy modpacks and or simple Peaceful worlds.