Minecraft Java 1.21 Mods
Browse 109,185 free mods for Minecraft Java 1.21 — popular picks include P1nero's Better Structure Block, Ultramarine, ExtraButtons.
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P1nero's Better Structure Block
A StructureBlock without size limit, also add some useful function for mod developer.

Ultramarine
An ancient Chinese style building blocks and decorations mod.
ExtraButtons
Adds additional button and switch-like blocks.
Enchantable Blocks
Allows enchanting of some blocks to change how they function
Twilight Tweaks
Adds a very configurable final boss among other config options.
Terralith, Incendium, Nullscape Biomes Names
Terralith, Incendium, Nullscape Biomes Names Lang fix

3D Default
A light-weight resource pack mainly provide vanilla-look 3D models
PVP Flagging
Enables players to flag or unflag themselves for PVP. Admins can create PVP zones.
LAN Operators
This mod adds /op and /deop to Open to LAN worlds

Create: Structures Arise
This mod added 28 new create structures to your minecraft world.
Create: Arm-made Cuisine
Make Mechanical Arm interacting with Cuisine Skillet.
Death Finder
Deaths happen. Finding your items should not be the hard part.

Load Support
Shows when the user has too less Java memory allocated, and plays a sound when the game has loaded.
Reinforced Shulker Boxes
Fabric mod to add reinforced shulker boxes

Translucency Fix
Because Mojang doesn't want to
MAtmos ambient sound
The MAtmos Ambient Sound Mod adds environmental and interaction sounds, raverberation, and echo to dramatically improve your gaming audio experience.
Create Picky Wheels
Makes Create's Waterwheels and Windmills have requirements [biome, space, position].
Minecord (for Discord)
Bring your Minecraft world into your Discord guild
Yuushya 16x
Change the way Minecraft looks
Fitting XP Mana Bar for Iron's Spells 'n Spellbooks
The mana bar refitted to be used over the XP bar with comfort
Quilt Kotlin Libraries (QKL)
Quilt's official Kotlin libraries
AL's Zombies Revamped
A pack that revamps Zombies and adds more variants!
[SBW] AshVehicle
A mod that adds various vehicles to SBW.
Health Indicator TXF
Health indicator on player screen

Carpet PVP
Fork of Carpet Mod that fixes PVP-related bugs with carpet fake players and adds some new commands.
Fallen Gems & Affixes
Fallen Gems & Affixes is huge addon to the Apotheosis mod
Genetics: Resequenced
Extract mobs' Genes to gain their powers!
Content Creator Integration (Forge)
Do practically anything you want when a stream event happens. Subs/cheers/tips/hosts/etc. Anything.
PNC Ocean Addons
A small addon mod for PneumaticCraft: Repressurized with some ocean-themed additions
Mythic Compat
A small library mod to add recipe compatibilities for Mythic Upgrades.
HRTF Fix
Fix MC-265514.
LootBag Patches
Patching Some Bags
Excalibur | End Remastered Support
Excalibur Support for End Remastered Mod
MOA DECOR: ELECTRONICS
Add new models of decorative electronic items to your builds.

VillagerTradeFix
Solution for the villager trade abuse
Dehydration Expanded Drinks
Adds a few modded items to Dehydration's thirst system