Minecraft Java 1.21 Mods
Browse 110,298 free mods for Minecraft Java 1.21 — popular picks include Touhou Maid: Affection, Lura's Night Vision, Better Combat Extension.
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Touhou Maid: Affection
Adding a “kiss” feature to Touhou Little Maid, inspired by “kiss-a-friend”
Lura's Night Vision
Tiny night vision resource pack for Polytone or OptiFine

Better Combat Extension
Extends the mod 'Better Combat' with additional functionality.
PBR JG
Free HD, realistic resource pack at 256x with PBR shader support. (Java conversion of JG RTX.)
No Fire Overlay
Removes the annoying fire overlay that takes up your screen
The Roads More Travelled [TRMT]
Make your world feel more immersive by adding a gradual erosion system to the terrain you walk on.

QDAA
Quick & dirty antialiasing, based on supersampling (2xSSAA)

Better Fletching Tables (BFT)
This datapack/mod gives an actual use to the fletching table other than trading with villagers.

InstaRestock
Instant Restock or Insta Restock makes villagers infinite restock

Gunshell
With this plugin you can add guns, ammo, throwables and melee weapons to your server.

Enchantment Compatibility
Make many mutually-exclusive enchantments compatible.
Enchantment Glows - Thin Outlines
Adds a glowing visual effect to enchanted tools
Low Fire (by Oculie)
Lower your first-person fire to enhance visibility!
Showy's HT1 mods
The mods I (show_y) use for PvP
Pickaxe of the Gods
Ressource Pack for Pickaxe of the Gods (POG) Plugin
Create Live 6
Modpack based on the Mod Create, this time with a secondary new Mod Ars Nouveau!

Multiverse-NetherPortals
Make nether and end portals work like expected in multi world environments
Nicer Rain
Changes texture of rain and splash particles to make rain look nicer
Marlow's Resource Pack
OFFICIAL MARLOW TEXTUREPACK FOR CRYSTAL PVP AND SWORD PVP

Duels Optimised
Duels Optimized | Fork of Duels plugin but optimized and added feature
[Let's Do] Hearth & Timber
Craft timber houses with beams, frames and sturdy wooden details that make every home feel hand-built and storied.
Gama Vision (NIGHT VISION)
Full-brightness Night Vision resource pack using OptiFine custom lightmaps. Simple, lightweight
Easy Auto Cycler
Automates Easy Villagers trade cycling with advanced filters! Set multiple criteria including custom payment items, minimum enchant levels, AND/OR logic. Session persistence saves your filters. Client-side with intuitive GUI.
Exosphere 2
Versatile pack on unique sky islands, full of quests and new movement!

Psi
Psi is a mod about spell programming, inspired by Mahouka
Happy Ghast Girl
Pretty sure I'm the first one to make this.
MysticMonss
This is an Add-On for Cobblemon.
Gray's Mob Overhaul x Fresh Animations
A Fresh Animations Add-on for Gray's Mob Overhaul
ImageTitles
Replace Minecraft titles with custom images. Create a resource pack with the images and you'll be able to display them to all players on your server.
Nugget's Female Gender Chest (Discontinued)
This pack gives you chest model, only for alex player model btw

Brutal Nightmare : Insane Difficult
Minecraft too easy? Try this mods with nearly 40 modifiers - settings new mini bosses, which made minecraft become hard & insane. Enhanced hostile mobs' AI & Angry passive mob. Zombie place/break blocks. Skeleton,Spider,Creeper,Enderman.

Dark GUI Experience+
Enhances Dark Mode
Ars Monde
Dimension built for the Mod Ars Nouveau!
Visual Traveler's Titles Minecells Edition
Traveler's Titles for Minecells! Maybe more mods to come in the future.
DB's Minecraft REFINED
A collection of mostly client-side mods that aim to polish the overall vanilla Minecraft experience.
Vital Delight
This mod is an add-on for vital herbs mod to make it compatable with farmer's delight.