Minecraft Java 1.21 Mods
Browse 126,829 free mods for Minecraft Java 1.21 — popular picks include Advanced Compounds & Alloys, mutes, No Void Death.
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Advanced Compounds & Alloys
AC&A is a very large mod mainly based around science. It is MOSTLY scientifically accurate, but of course not completely, some things are simplified for gameplay (though not massively) and some things I have not been able to find good sources.
mutes
A simple plugin for Mut, nothing extra, just what you need
No Void Death
This project removes the ability to die to the void in The End. If you fall into the void, you will instead be teleported to world height in the Overworld with resistance V applied - so the fall is not fatal.
Quinn's Better Noteblocks
A datapack that overhauls note block functionality in a non-intrusive way. Note blocks are much easier to tune and have a much larger pitch range!
Mostly Optimized (FORGE)
An Optimization and quality of life Modpack with lots of features. Supports 1.21.8 (1.21.9 support coming soon)
Effect particle icons
Replaces effect icons with their particles
combine optimize
fps boost lightweight and focus on performance modpack
Terminal Blocks
Transforms Command Blocks into 'Terminal Blocks'
Tropicalia
Tropicalia is a mod that adds a more tropical touch to MC, with flora that sell the castaway vibe of the mod.
MineRestor ⛏ | survival , Roleplay mine and farm plugin
Custom mine and farm construction plugin for Minecraft server, simple and powerful
No Compromises
A no compromises modpack, to fit everything you might need to enjoy Minecraft!
Quary
Mine out a square of blocks under you.
FlipIt
Mod that allows you to flip items in your hands.
PowerAntiRelog
Prevents combat logging by dropping items if player logs out
ExpBooster
ExpBooster is a powerful and user-friendly plugin for Paper servers that enhances the gameplay experience by allowing server administrators to modify XP drop rates from mobs through an intuitive GUI interface.
Shulkerised
You dont want to Kill the Enderdragon but still Want the items? Here is the Solution! | Craftable Shulkers
CookieGUI
An Free and simple GUI maker plugin that supports Placeholderapi, color codes and so on (Also includes in game gui editor)
CRYONETICS Rebooted
Official Modpack For Voltcore's Newly Added Installment : "Cryonetics: Rebooted" Explore A World Full of Dangerous Creatures With Hardcore Temperature And Thirst A World They Said Was Impossible To Live In
No Text
WARNING: DO NOT USE UNLESS YOU KNOW HOW TO GET TO THE RESOURCE PACKS TAB FROM MEMORY!!!
The Forgotten Arts
A mod that adds art styles with abilities, that can be unlocked for mid/late game. Preferably to be used on multiplayer servers

Projectzstd
New armor, weapons and tools
xLinks - Use Custom Links In-game
use /discord and /webstore /yt etc... in-game
Blood God (Origin)
(NEEDS ORIGINS) a little tribute to techno (made for my own modpack)
Seva ya Enchanting Trims
A mod that adds an alternative way to get enchantments reliably and repeatably.
VelocityPlayerList
Allow you list all players on the Velocity server in game.
Cursed Tools
Adds many cursed tools to your game!
ClearCore
Featuring an Immersive and Ambient Experience! The official ClearCore Modpack! 1.21.1 Release

Strider Texture
Simple but fresh Strider vanilla-like retexture.
Too Many Animations
Removes all animations from mobs, players and some blocks.
MythicMines
Mythic Mines Offical Pack for Minecraft
OhMyResin
Added some command to simulate resin generation
Flat Shield
Makes your shield flat
Uncraftable Items Refreshed
Adds 18 recipes so you can craft some uncraftable items in Minecraft 1.21!
Gog Esque
A Celestial Resource Pack made to simulate a similar Style to Botania's Garden Of Glass Skybox.
Cactoid
Replacing some of cactuses to cactoid creatures
Arataki's greenhouses
This mod adds a new block, using which you can unload the routine of extracting items of plant origin, because now the greenhouse block will do it for you