Neoforge Mods for Minecraft 1.21
Browse 18,783 free Neoforge mods for Minecraft 1.21 — popular picks include OPack2Reload, Haunted Harvest, Biome Sizes.
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OPack2Reload
Prevent Minecraft from reloading the resource packs if the player doesn't really change the selected packs. Also add a "Cancel" button to PackSelectionScreen.
Haunted Harvest
Pumpkin Carving, Corn food and Halloween Trick or Treating for villagers. Farmers Delight and Autumnity compatibility. Not just a seasonal mod
Biome Sizes
Customize Biome Size settings per dimension
Mob Drops Recipes [Overworld]
Now you can craft drops from hostile mobs in the Overworld!
Loot Integrations: Towns and Towers
Adds better loot to Towns and Towers chests, including modded loot

Cobblemon Pokemon Badges
This mod adds all main-line Pokemon badges into Minecraft!
Create: Winery
Build your own winery with Create.
MI Tweaks
Some tweaks to MI for pack creators and addon devs.
Fancy Trinkets
All kinds of helpful baubles (using curios) for various buffs
Snowy Tents
Adds cozy snowy tents to snow biomes, filled with stuff to discover
RenderJS
An mod that supports the modpack authors using KubeJS to draw HUDs and register ItemDecorator(item extra render in inventory), as well as a mod for rendering blocks and items in the world.
L's Spooky Trees
Adds spooky trees to forest biomes
Crate Delight (Forge & Neoforge)
Useful crates and bags for Farmer's Delight that will save you storage and look great.
STRAYED FATES: Forsaken
A collection of detailed abandoned Vanilla-friendly structures
Spiky Spikes
Don't step on it! Hurts almost as much as stepping on LEGO... ouch
Epic Fight - Better lock on
Added a lock icon for EF, as well as other optimizations
Harder Natural Healing
Control healing in your game. Rate, Hunger Cost, Hunger Minimum, Healing On Waking, Peaceful Hunger
XK's Decoration
a multi-purpose decoration mod that adds more than 600 blocks, featuring a variety of themes ranging from many ancient civilizations to sci-fi punk or factories.
DarkMobs - RPG Mob Difficulty (Dark Souls Like Mobs)
RPG Increase difficulty of mobs making them harder to kill and making it a challenge
Universal Mod Core
Core Library for version agnostic Minecraft Mods

Relics
Just a mod about useful items with unique mechanics :3
Furnish
Fancy furniture for Minecraft!
Cobbleloots: Loot Balls and More!
A side-mod for cobblemon that adds different ways to obtain items like in the original games.
Blue Archive Halo
Render halos for beacons. client only.
ManyIdeas Doors
Provides over 125 big multiblock and normal-sized doors.
Better Combat x Apotheosis Compat
Better Combat compatibility for Apotheosis
DarkRPG Menu - DarkMenu (RPG Theme)
Main Menu From DarkRPG Pack
Cool Rain Reforged
Creates ambient sounds for certain blocks during rain
Nature's Delight
A mod to bridge Farmer's Delight and Nature's Spirit
Mermod (NeoForge)
Adds a necklace that gives players mermaid tails upon contact with water.
Craftoria
500+ mods and 2000+ quests featuring tech, magic, automation, exploration, and deep progression with custom content and balanced gameplay
Mob Drops Recipes [Nether]
Now you can craft drops from hostile mobs in the Nether!
Cobblemon Move Inspector
Clientside in-battle move inspection for Cobblemon
Zombie Horse Spawn
🧟♂🐴 Allows zombie horses to spawn with a zombie riding it and other tweaks.
FTB StoneBlock 4
The stone remembers. Dive into StoneBlock 4, the next evolution of Minecraft’s underground survival: explore handcrafted Vaults, learn from ancient Echoes, power the World Engine, all on 1.21.1
Trample No More
This mod adds a few nice tweaks to Minecraft's farmland trampling.