Minecraft Java 1.21 Mods
Browse 3,621 free mods for Minecraft Java 1.21 — popular picks include ValhallaMMO, Name Tag (Craft & Drops), Spears, Axes, Swords, Shields, And Other Tools (SASSOT).
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ValhallaMMO
Specifically designed to counter the 2-week gameplay cycle. Keep players active for longer! (Also known from The Realm SMP!)
Name Tag (Craft & Drops)
Adds a crafting recipe + name tags drop from entities when killed

Spears, Axes, Swords, Shields, And Other Tools (SASSOT)
A vanilla-style mod that adds Spears, expands on Shields, and reworks melee combat & mining tools.
Actual Fishing
A mod that changes the fishing system to force you to pull real living fish from Minecraft's waters
Sanity: Renewed
Brings the sanity mechanic from Don't Starve into Minecraft
Origins-Mobs
An Origins Reborn origin addon for PaperMC servers, based on the Mob Origins mod by UltrusBot
Holo Damage Indicator
Adds client-sided, customizable and animated damage indicators when entities take damage/heal.
Pastamon [Cobblemon]
a Cobblemon Addon that adds pokemon from various creepypasta's to the game
StackMob
Enhance your server performance by 'stacking' or 'merging' entities.
Knarfy's Dumb Weapons
A collection of terrible weapon ideas suggested by audience members, and coded into Minecraft for Knarfy's Video!
Cattlestrophic!
A mod introducing new mechanics on animals breeding and growth.

Immortal Pets
Makes all pets immortal, because it's too sad when they die.

Crimson Curse: Infection
A virus dormant in the Crimson Forests of the Nether escaped to the Overworld. Now with access to water, it began evolving into horrors one could only imagine....
Enderite Overhaul +
Enderite upgrade = new material , Armor + weapons + tools! MOBS , BLOCKS, KATANAS UPDATE Rideble Dragon update
Spontaneous-Replace
Provide players with enhanced vanilla adventures with new content
Custom Breed Cooldown
Change the breed cooldown for mobs and villagers!
Origins-Monsters
An Origins Reborn origin addon for PaperMC servers, adding 6 new origins and 4 variants, themed on Minecraft monsters
Call Your Cat
Easily call (whistle) your cat with a goat horn to teleport it to you
Happy Ghast but Fast (2x Speed)
This makes the happy ghast faster using Minecraft attributes
Double Shulker Shell Drops
Makes shulkers always drop atleast 2 shulker shells upon death so that you aren't left with an odd number of shells.
Psittacine
Breedable parrots, 35 new parrot skins, colorful feather blocks, transport cages, and functionality tweaks.
Mob Hearts
Shows you the hearts of all mobs above their heads.
Cobblemon Move Tutor
Adds a Cobblemon NPC for Tutor moves!
Spawn Chunks Disabled
Spawnchunks will no longer be forceloaded
Anti Enderman Grief
prevent endermen from picking up blocks!
Create Cogs Invaders
A new mechanical presence has emerged within the world of Create.
Peaceful Nights
Prevent mobs from spawning on the surface during night and thunderstorms.
TradeManager
Customize villager trades, prevent specific trades, and seamlessly integrate with Nexo and ItemsAdder.
Raid Bar
The Locator Bar shows where Pillagers are during raids and at outposts!
Gain Friendship From Melodies
A simple mod that allows you to use the instrument from Immersive Melodies to increase the friendship of your Pokemon(from the Cobblemon mod) by playing music.
Axolotls Ignore Passives [PurpurPack]
Datapack that stops axolotls from hunting passive mobs
Cobblemon Environment Interactions
Turn your Cobblemon partners into useful field companions.
Carpet Minitweaks
An extension for Carpet Mod with many toggleable survival-oriented game mechanic changes
KingdomsX
Battles for might, land and glory. A complex international land & team management plugin.
Corner Entity
is an atmospheric horror mod that turns your peaceful Minecraft survival into a nerve-wracking experience. You will never feel truly safe again, as something is watching you from the shadows, waiting for the perfect moment to strike.
EssentialsX Protect
The config-based gameplay control module for EssentialsX. (requires main module)