Minecraft Java 1.21 Mods
Browse 125,203 free mods for Minecraft Java 1.21 — popular picks include Undopia 3D Ladder, DiceFurniture Plugin / Möbel Plugin, Respawn.
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Undopia 3D Ladder
Gives the Ladder a 3 dimensional model
DiceFurniture Plugin / Möbel Plugin
Furniture, ArmorStand, ProtocolLib, FurnitureLib, Möbel
Respawn
Server utility that allows configuring the default dimension players spawn in
L's Ocean Trader
adds a new villager, the Ocean Trader and his lighthouse

Fresh Weapons & Tools
Enhanced vanilla-style weapons and tools with unique details for every material

Greek Mythology Mash-up
Build a pantheon fit for the gods, trap the Minotaur in an elaborate maze, or set sail for adventures across the sea – the world is your square oyster! A port from Legacy Console Edition.
Emissive Glowing Ores
Makes ores glow to enhance visibility. (OptiFine/Continuity required)
Auto Sprint : key toggle
Client Only mod to Toggle automatic running with a keybinding. Works with Swimming, riding, etc
Happy Trails - Control Movement Speed
This project lets you control movement speed. This can reward road building; allowing faster movement on dirt paths and brick roads; or make walking through tall grass or on desert sands slower;
Skyblock Tweaks (1.21) – Hypixel Skyblock
Hypixel Skyblock's most customizable 1.21 mod, providing many tweaks, HUDs, and other gameplay enhancements.
[1.17.1 - 26.2] Ultra Cosmetics [OPENSOURCE & FREE!!]
#1 Cosmetics plugin! Treasure Chests, Gadgets, Hats, Pets, Morphs, Mounts, Effects and more!
Presence Footsteps: Escape From Tarkov
Minecraft not tactical enough?
Meme In A Bottle
Memes + Throwable bottles = Fun
Better Allay
Customize how allay differentiates between potions and tipped arrows. Optionally can make allays pick up items even when mob griefing is off and set time for how long allay likes noteblock.
Map Link (formerly Remote Player Waypoints for Xaero's Map)
Downloads and converts tiles and synchronizes players, markers and area overlays from Bluemap, Dynmap, Pl3xMap or Squaremap with Xaero's Minimap and Worldmap. Also displays AFK time in the tab list.
Eclipse
A Revamped Version of EclipseLite, In Cooperation with Gamer Ben
I Want That Back
A small quality of life mod that lets you be able to get something back from minecarts with hoppers/chests/furnaces/tnt as well as chest boats.
WATERMEDIA: Multimedia Binaries
Binaries for WATERMeDIA: Multimedia API
Simple Guns: reworked
Make weapons with vanilla resources!
Nyctophobia Dread
A datapack that adds a new horrifying creature to minecrafts caves and dark spaces
Nether Wart Blocks to Nether Warts [Fabric/Forge/NeoForge]
A configurable mod that lets you craft Nether Wart Blocks back to Nether Warts
Construction Wands Revived
Construction Wands make building easier! (A new take on the Builder's Wand) ported 1.21.1 NeoForge
Milk All The Mobs
🥛 Allows sheep, llamas, pigs, donkeys, horses and mules to produce a bucket of milk.
Tool and Placement Tweaks
Configurable hunger and durability penalties for placing and breaking blocks
Light Overlay
A simple mod to provide users with NEI-like light level overlay.
Leathered Boots
Comfy and sturdy boots!
Tetrachord Lib
A lightweight library mod that provides various data structures such as KD Trees and Segment Trees, alongside some other utilitarian functionalities.
AStages
Restrict nearly every aspect of gameplay based on progression.
Carry On Extend
Throw out the entity or blocks you are holding
Hypixel SkyBlock Legacy
A continuation of the legacy Hypixel SkyBlock art direction.
FreeLook Mod / Perspective mod
Freelook mod for fabric
Stereo's Default+
Shadows, Waving Water and Lava
PVP SMP Deluxe
PVP Focused Texturepack | Low Fire | Low Shield | Vanilla Like.
[CTL] Calm The Leaks
This mod extends atl outputs, recognises leak trends, and then recommends fixes based of confidence levels after leveraging spark data. CTL doesn't hide real problems - it filters startup noise and false positives so you can focus on real leaks.
Kal's Grimdark Sky Pack
Custom Sky w/ Exoplanets, Chaos Moon & Shooting Stars by Kalamon
PixelTweaks
Tweaks minor things in pixelmon, such as adding shiny spawn effects!