Minecraft Java 1.21 Mods
Browse 126,375 free mods for Minecraft Java 1.21 — popular picks include Chickenfix, Networker, Lego Renderer.
Step by step: How to install Minecraft Java mods & modpacks
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Chickenfix
A really hacky workaround for chickens suffocating when growing in a 1x1 space, designed for my fox-based chicken farm (temporary fix for MC-9568)
Networker
Allows you to provide your server's Social networks with ease.
Lego Renderer
Renders everything as a moving picture made from legos! All in real time and in vanilla Minecraft.
Mod That Closes The Game When It Opens Mk.2
An experiment to make the smallest possible Fabric mod (with actual code). Does what the title says.

Difficulty by Distance
Adds the option to scale difficulty infinitely the further out you travel, alongside applying scaling to more mechanics and tools for pack creators.
Critter Balls for Hypixel Skyblock
A resource pack that replaces Critter Capsules with custom Pokeball style models on Hypixel Skyblock.
Vortex Tier Tagger
This is a custom mod made specifically for Vortex Tier players to see other players tier in game while fighting.
ShadowStriker's FPS Optimized
A lightweight Fabric modpack that maximizes FPS with powerful performance optimizations and essential client-side enhancements for a smooth vanilla Minecraft experience
Better Trim Tooltips Reborn
Compact, colored armor trim tooltips: one 'Pattern (Material)' line instead of the vanilla three-line block. Unofficial 1.21+ revival of Better Trim Tooltips.
Age of The Ring (Official Server Pack)
Feudal kingdom roleplay server featuring the Middle Earth Minecraft mod for Fabric 1.21.8
DeltaCraft - SOULBOUND
A texturepack for the mod SOULBOUND to make the UI and sounds more minecraft like
Glowing candle for Dynamiclights
The resource pack adds dynamic lighting and flame animation.
Builder's Enhancements
adds a bunch of blocks from content smp aswell as some of my own, custom discs and ports over shopkeepers and some of essentialsx to fabric

Other Player
add other players to your world
Ars Dragongate
Locks Ars Nouveau (and its addons) content behind defeating the Ender Dragon.
snowee333's Visible Cobwebs: Blue
This resource pack makes it easier to see cobwebs in PvP and everything else! This pack is Blue!
Map Chameleon
Sends customizable world names to client-side map mods on multi-world servers.
Rainbow Barriers
Changes the barrier block to Pride Colors! (happy pride month)
ModPackServidores
This modpack is focused on improving animations for various aspects of the game, including player skins, animals, villagers, and many other mobs. It is also optimized to enhance Minecraft's performance and overall gameplay experience.
Small Important Tools
Small Important Tools [No PVP Tools]
KitFlow Index
A Fabric client kit stock overlay for totems, crystals, pearls, anchors, and support blocks.
TierOverlay
TierPlates displays player tier badges from MCtiers, PvPTiers, and Subtiers in nametags, chat, and the tab list. It is a client-side Fabric mod with configurable icons, colors, layouts, and display modes.
InstaKeystrokes
A clean and customizable keystrokes HUD mod for Fabric 1.21.4 with draggable UI, color customization, and a modern design.
FancyHAT
The ultimate high-performance hat plugin that prioritizes your items' safety while making customization effortless. Fully translatable, admin-friendly, and built with an asynchronous engine to keep your TPS rock-solid.
Programmer Art Materials
The classic look of Minecraft materials
Recap
Replay Minecraft moments in-game. Record it. Replay it. Relive it.
PurpleMusic
A Paper/Folia plugin built on the Simple Voice Chat API that lets staff stream real audio (wav / mp3 / flac) to players, build queues and playlists, and create persistent music zones around any location.
No zombie sounds
Removes all zombie sounds
Chack's RP (crosshair)
A better Crosshair and Crit particle
Herbal
A set of overworld and nether teas that need a new crop to make. They all grant a different effect custom to the mod changing the user physically.
SmartCords
Clean and useful coordinate overlay for Minecraft. Shows Nether ↔ Overworld converted coordinates and minimal HUD.
Item Damage Lib│物品損傷庫
A new function has been added that can consume the durability of items.│新增了一個函數,用於消耗物品耐久度。

modmod
DiamondFire QOL mod for support staff and moderators
MusicWheel
This mod adds cool music selection wheel + music controller for various events
Saturated Ceramics
Brings life to vanilla terracotta by fixing its dull and greyish appearance.
Smeltable Raw Ore Blocks (1.21.Xׁׁ)
Tired of managing dozens of furnaces? Upgrade your smelting game! This datapack allows you to smelt Raw Gold, Iron, and Copper Blocks directly into their processed versions.