Minecraft Java 1.21 Mods
Browse 2,071 free mods for Minecraft Java 1.21 — popular picks include Lost Discs, CrystalSizes, Mobius.
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Lost Discs
Adds two previously unused Minecraft Alpha tracks that deserved to be music discs.
CrystalSizes
lets you change the size off crystals and add a cham like overlay
Mobius
A Vanilla+ expansion featuring a mob leveling system, new ores and gear, lucky bags, and tea brewing.
HeadDropDimensions
This a Plugin that Drops heads based on chance pvp or pve and u can disable in each dimension or increase or decrease the chance in each dimension
CasleRush
CastleRush, inspired by the German Youtubers "Rewinside" and "Ungespielt". A Paper Plugin that you can install to play an optimized version of the Format. Build your Castles with how many friends you want and race against them at the end.
Bronze Age Mod - A Dip In The Past
Immerse yourself in the Bronze Age! Meet new metals, building blocks and foodstuff which will bring you back to an Age of Heroes.

Void Fire
Adds purple end style fire to minecraft.
MOTD Studio
Add better customizable MOTD for better looking & nicer SMP

Project: Nuclei
Adds uranium ore, lead ore and an enrichment process for making uranium rods. Also adds graphite rods (crafted with coal), a nuke, a radioactive seperator and various crafting components. In general this is a (kinda) scientific industrial progression mod.
Colorful Bottles
Decorate your storage with Colorful Bottles!
LightChatWelcomer
Simple spigot plugin to display custom join messages
Kid Icarus Music Disc Pack
Nintendo Music Disc Series: VOLUME VII
GemShrooms Re-crafted
A mod that adds new crafting recipes for unobtainable items and blocks like spawners and spawn eggs in a vanilla friendly way.
Locator menu gui
this mod adds a menu/gui that will track any mobs/players near you in the render distance you have on, this mod also shows how high or how low the mob is from your position, click t to open chat and drag/move the menu (works with mod menu for options)
Pocket Lint
A progression mod built on the paradox of scaling worthless domestic debris into god level cosmic utility.
3dCreator
Transform your Minecraft builds into real-world 3D prints!
Hallownest's Remains
This mod adds the remnents of the ancient civilizations of Hallownest and Pharloom from Team Cherry's Hollow Knight and Hollow Knight: SIlksong.
AllPlayerHeads
A Minecraft datapack that lets you get any custom head off minecraft-heads.com, without using any plugins or mods.
Capture Biomes
A PaperMC plugin that lets players capture a biome in a bottle and release it elsewhere.
Crafting Saplings
This datapack will add the ability to craft saplings of trees.
Explosive baby's mod
a throwable baby that explodes on impact
EG Tools Expanded
Adds additional tools to Minecraft Java Edition - Paxel, Construction Hammer, Paints + Paintbrush
Happy Trains
Happy Ghasts in minecarts look forwards!

Iron Lodestones Backport
Lodestones use iron instead of netherite (backported from 1.21.5)
Mini Ender Chest
Adds a cheaper, smaller version of the Ender Chest, entirely in a datapack
Project Scraffold
Replace scaffolding in one click by right-clicking it with a placeable block
Nonsense
A new dimension with unique and creative biomes ...
Live Musical Instruments
A plugin that lets you play electronic instruments live and broadcast the performance to players in real time.
Hoppers Fill Bundles
Hopper fill and empty bundles when placed in decorated pots. Dev on all my projects will be paused for the duration of the BDS boycott against Microsoft.
Stats Overlay
Minimalist in-game HUD to monitor your world statistics. Easily track your FPS, location, progress, and others.
BoatSoundUtils
Client-side block tap and boat bump sounds for boats.
DonutMotd
This is a simple plugin which is a fully customisable motd supported with minimessage api and hex.
Streaker
A plugin that will get players to join your server
Revamped
This mod adds more vanilla feel additions to the game.
Warfre's Mob Personality
Enhance your vanilla experience with tons of variants and details.
Stellar Nullius
Interstellar travel in style