Minecraft Java 1.21 Mods
Browse 11,200 free mods for Minecraft Java 1.21 — popular picks include Flat Fire, Slashbridge, Freddy FazCreator.
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Flat Fire
literally what else do I need to say

Slashbridge
serverside utility mod aiming to add in minecraft commands that I think the base game lacks, bridging datapack and mod function.
Freddy FazCreator
Makes the Creator (Music Box) music disc play Freddy's music box from FNAF 10% of the time
Catter's Enchantment Tweaks
A Vanilla-friendly datapack that improves and rebalances the Vanilla enchantments, without adding any new ones of its own.
Zyphorix Green
A Great 16x PvP Texturepack Recolor that Enhances the Modern-PvP Experience
Bells & Whistles Models Fix
Fixes rails, steps and pilot blocks from Create: Bells & Whistles
Tweaky
A collection of 90+ lightweight, toggleable, configurable vanilla tweaks.
EventEngine
Utilities For Hosting Events
Better Stone Sword
Custom made, new texture for the stone sword.

CPVPULTIMATE
It is an Crystalpvp texture pack that will make your gameplay feel cleaner and will speed up your anchors and crystals
Nouuur_ pack
The pack of @Nqouir has a very distinct style that clearly moves away from the default Minecraft look. Instead of sticking to vanilla, it gives the game a completely fresh and unique appearance.
Moon Darkens 月色漸濃
Genshin and cats, overwhelming cuteness!
Connected Sculk
Resource Pack that allows sculk veins to be connected.
Better Carved Pumpkin
Makes Carved Pumpkin and Jack o'Lantern 3D so you can see the inside!
Rena's Sand
Tweaks Sand & Sandstone's textures, along with giving Red Sand a change in pallette!
Gaytopia Server Pack
Server Resource Pack for the server mc.gaytopia.lgbt
qlt's 3D Blocks
Changes some of the regular 2D minecraft blocks to 3D style
Better Tools/Mejores Herramientas
Better Modified Tools/Mejores Herramientas modificadas
Die Schmiedewerkstatt
Die Schmiedewerkstatt (The Blacksmith's Workshop in German) includes weapons for different playstyles (also known as classes), items to make things easier, and tools to break and create more stuff. It also has some extra tweaks.
Kelp & Seagrass Begone
removes kelp AND seagrass textures entirely
Kitchen Sink Modpack Template Pack
A modpack with many basic mods for starting a kitchen-sink modpack. Including world gen, performance, graphical, storage, extra mobs and quality of life mods.
Precious Prismarine
Make prismarine shiny!
Clover's light block tweaks
Small tweaks to 90% of light blocks
PDB3D's Bare Bones Details
Adds details to single-colored blocks.
Ruby Red Diamonds - Weapons Expanded
Replaces the diamond weapons with a ruby color, or blood red.
Endermen To Slenderman
This Texture Pack Retextures Endermen To Look Like Slenderman
Zenitsu PvP
A PvP texture pack that combines a stunning purple aesthetic with clean visuals, a modern UI, and FPS-friendly optimization to give you a smooth, distraction-free combat experience.
Small Totem Blue
A Small Minimalistic blue themed totem
Meadow Grass Everywhere!
Changes the Grass colormap so it always matches the Meadow biome color – Part of the "Oh My Colormap!" collection.
3D Hoes
gives hoes 3D models

Remove Snowballs
This Texture pack removes the snowball texture, letting people build massive redstone builds that require snowmen to shoot mobs
Clean Screen
Clean screen when use spyglass
Create: 3D Clipboard
A 3D Model version of the Clipboard item from the Create Mod
Booked
Gives books a held item model.
Reitems
Reimagined the textures in Minecraft vanilla and some mods.
Pretty Pretty Pipes
Brings the 'Pretty Pipez' style to Pretty Pipes!