Minecraft Java 1.21 Mods
Browse 21,905 free mods for Minecraft Java 1.21 — popular picks include Uncommon Ores, SponsorVouch, Synchronized Inventory.
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Uncommon Ores
New ores with special mechanics
SponsorVouch
SponsorVouch is a trust-based progression plugin for Purpur/Paper that uses sponsor-ward relationships, social status tiers, and mirrored accountability to control access and strengthen your server community.
Synchronized Inventory
This datapack synchronized every player's inventory. Whenever a player obtains or loses an item, everyone also obtains or loses it.
PVPChoice
Players are prompted on their first join to choose whether PvP is enabled or disabled for their account. This choice is permanent to prevent combat abuse but can be changed by server operators if needed. /pvpchoice is the command to toggle it

Convenient Crafts
This adds new recipes into the game for more convenience.
TimeX
Basically Lifesteal But It's All About The Time.

HalfHPOnDeath
A plugin that adds deathPenalty to players. Halves the player's HP upon death.
BannerHelmet
Equip banners as helmets. And optionally gain customizable potion effects based on their color.
Better Craftable Bells
Adds the ability to craft the bell using any wooden slab!
LifeSpecPlugin
all abilitys are used via /spec activate
More Recipes: Change Copper Golem Pose
Change the Copper Golem pose for storage without having to place, change, and break each one individually.
Blue Aercloud Nerfs
Balances The Aether's Blue Aerclouds when in the Overworld or when using Elytra.
Radio secrets players
Adds new block - radio. There are 16 switching channels
API-GeneratorColor
A tool designed to generate and convert color values in HEX format.
Teggs Woodcutter
Allows you to put wood in the Stonecutter with mild efficiency
Notch Apple Recipe in 1.21.4
This datapack adds back the old, nostalgic crafting recipe of the Enchanted Golden Apple
Cuboids
You can create your own cuboid and be safe from other players!
World Anchors
Over world teleportation system based on fixed locations.
EnlightME
A simple datapack that makes you and your friends shine!
Placed Stats
Adds a sortable Times Placed column to Minecraft's vanilla Statistics screen.
PetCore
Cozy companion pets for Paper: adopt from a YAML catalogue, follow/stay/home behaviour, an owner-defined pet home, bonding with tiers & rewards, cozy cosmetics (personalities, titles, emotes), and token gifts. Standalone, EN + NL.
shepherds house repair
Fixed the issue where the Shepherd house could not be generated
simplecombatguard
This project adds combat tagging that blocks /home, /spawn, and other teleport commands during PvP, with a relog-proof cooldown timer.
Biomes plus
Biomes Plus — 7 new biomes: foggy grove, lost forest, misty highlands, driftwood swamp, windswept plains with menhirs, olive grove, salt basin.
Magnot
Tired of your magnets messing up your auto-crafts? Well, Magnot! Define walls or areas which block magnets from any mod. Filters coming very soon. :)
happy variations
A minecraft datapack which randomises the size and speed of happy ghasts
Soul Works Mod
This is a mob spawn utility mod.
BEAST SLAYER TOOLS DATAPACK (PRO STUDIOS)
BEAST SLAYER TOOLS A feature-rich custom datapack designed to introduce unique gameplay enhancements and custom mechanics. Features custom items like the Beast Slayer, adding powerful new utility and combat capabilities to your world. Fully optimized
Only Jetpacks
This mod adds jetpacks that the player can use to fly around, as well as a new way to play the game where you can make it where every single mob in Minecraft has their own jetpack, creating a world of chaos.
mc is too ez
A survival difficulty mod that makes Minecraft harder, more punishing, and less forgiving.
Quality Of MC
Improves gameplay for casual and non-casual players
EcoMenus
The most powerful custom GUI plugin ever.
Are you Human?
Whenever you do stuff you get asked a question (e.g. Are you human)
GlobalPvP
PvPToggle is a lightweight administration tool that allows server staff to globally enable or disable PvP combat instantly using a simple command.
OathPotion Stacking
Allows for easy Potion Stacking with limits to what can be stacked and what can't, easy use for any server.
OneStackMax
A datapack that makes all items unstackable