Minecraft Java 1.21 Mods
Browse 108,823 free mods for Minecraft Java 1.21 — popular picks include Mandala's GUI - Dark mode - Utopia extension, Useful Slime (NeoForge/Fabric), TaCZ Tweaks.
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Mandala's GUI - Dark mode - Utopia extension
110 mods compat for Mandala's GUI - Dark mode for 1.20 and 1.21
Useful Slime (NeoForge/Fabric)
Adds slime armor and items with cool abilities
TaCZ Tweaks
A collection of random tweaks and features to enhance my experience with TaCZ.
Mobs Properties Randomness
Randomize mobs properties. Add Potion Effects, apply Attribute Modifiers, add Equipment and more!
Cobblemon Spawn Notification
When a Legendary and/or Shiny Pokemon shows up, a message is broadcast to all players on the server.
Seals
Display your biggests achievements with style
Show Me Your Skin! (Hide armor)
A mod to hide or customize armor rendering.
StartInv | Seconds of Immortality!
You will start with a few seconds of immortality! You will never start dying again
Additional Additions for NeoForge: Vanilla+ QoL, Sniffers, Music, Food
A vanilla+ mod that expands on incomplete parts of Minecraft with additions that truly feel vanilla. Brings improvements to sniffers, music discs, enchanting, farming, food, redstone, and more.
Universal Enchants
Better enchantments! Use them on all tools and weapons. Infinity crossbow, or looting trident anyone?
Death Backup
💾 Creates back-ups of player inventories before death, which can be loaded via commands.
Epic Fight - Sword Soaring
You will enter the world of Chinese ancient martial arts novels, experiencing epic skills and heroic journeys.
Pretty Pipes: Fluids
Pretty Pipes Addon which adds fluid pipes to transfer your fluids!

Library Ferret
Shared code for the mod of jtorleon studios
DarkTimer - RPG Clear Entity Lag
RPG Style, Automatically clears and removes dropped items every 10 minutes to reduce server lag
Medieval Style Lootr
Turns Lootr's bright gold chests into more medieval chests.
Revelationary
Data Driven Block and Item Revelation system. Discover as you go!
AutoMessage
Now you can send automatic messages at any time during the game!
Gravestone x Curios API Compat
Adds compatibility between Gravestone mod and Curios API
Custom Entity Attributes (Modpack Utils Series)
Change entity attributes globally, per dimension, biome, difficulty, or time. With % chances too!
Respawnable Pets
A simple mod that allows your pets to respawn after death when you next sleep using a new item, the Etheric Gem.
More Babies
Adds more baby mobs! Baby Blaze, Creeper, Enderman, Shulker and many more...
Chests Reimagined
Chests Reopened!
Pufferfish's Biome Dither [Fabric & Forge & NeoForge]
Adds dithering on the biome borders to the game.

CobbleThemes
add various battle themes to cobblemon mod, and control them depending on what species the player is facing.
Pandora's Box
Pandora's Box is a relic of many mysteries. What secrets could it possibly hold?
Trofers
Adds trophies! Can be customized with data packs
Detail Armor Bar [Fabric]
Show more details of armors in Armor bar!
Loot Integrations: When Dungeons Arise & Co
Adds better loot to When Dungeons Arise chests, including modded loot
Bibliobiomes Legacy
Bibliobiomes Legacy is an addon for Bibliocraft Legacy that adds support for wood types from Biomes O' Plenty, Oh The Biomes We've Gone and Regions Unexplored.
JadeColonies
A Jade addon for MineColonies and Domum Ornamentum
Good Night's Sleep
Your dreams are new worlds for you to explore.
JeremySeq's Damage Indicators
Adds a directional damage indicator and damage text.
GeOre Nouveau
Adds Ars Nouveau golems for GeOre geodes

Hold My Items
Make your hands visible in first person!
Butchery
Realistically butcher everything in Minecraft!