Neoforge Mods for Minecraft 1.21
Browse 18,826 free Neoforge mods for Minecraft 1.21 — popular picks include Otyacraft Engine Renewed, Moss Fix, Extra Hostile Neural Networks.
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Otyacraft Engine Renewed
A library mod for Iam Music Player Renewed. Fork of Otyacraft Engine with updated libraries and support for newer mod versions.

Moss Fix
Highly configurable (or will be) server-side mod that fixes moss by allowing spread under transparent blocks
Extra Hostile Neural Networks
Adds the ability to combine 4 models into 1, thereby obtaining more resources

Musket Mod
Adds craftable flintlock weapons
Lazyboy's No Fire Spread
Stops fire from spreading in the world.
Aquatic Additions
Aquatic Additions completes the vanilla turtle armor and adds an upgraded version to enhance underwater exploration

Custom Nether Portal
Build Nether Portals of any size, form and in any direction: on the floor, on walls, on the ceiling or floating in the air.
Crafting Recipe Exporter
Adds GUI to export recipes to Json or KubeJS format
Area Effect Clouds 3D
Replace those flat Area Effect Clouds with new 3D version of them

Blur Perfected
Adds blur to GUIs, a fork of Blur+ that fixes blur animation calculation bugs and simplifies the logic
TFC Weld Button
Adds a weld button.
Berries & Cherries Delight
Adds various berries, cherries and fruit to Farmer's Delight

More Bows and Arrows
The objective of More Bows and Arrows is to improve the ranged combat of the games, adding around fifty bows and arrows with different abilities and characteristics.
Ancient Sands
A bit more adventure for the deserts.
ANARCHY Minibosses (RPG Series Plus)
Rogue Exile inspired Faction mod!
Agritech: Evolved (ATE)
Farming automation mod with planters, machines, modules, and power gen.

Create: Shuffle Filter
This mod provides a new "Shuffle Filter" item which, when used in Create deployers on contrabtions, enables a randomnes when placing blocks. (Like the shuffle mod for players).
The Fletching Table Mod
This mod makes the unused Fletching Table block useful!
T&L's Biome Trader
Adds 9 new biome structures with biome themed villagers. They trade biome themed items and offer new armor sets
Tom's Peripherals
CC: Tweaked Addon with High resolution monitors, 3D grahpics and more
Cobblemon Trainer Structures
Adds custom cobblemon structures with trainers.
ThreadTweak Reforged
Improve and tweak Minecraft CPU scheduling (again!)
Evolution of Entities
Mobs and animals evolve different traits and shape the future over time
Loot Integrations: Ice and Fire
Adds better loot to Ice and Fire Structures and Bosses, including modded loot
Christmas Culinary & Decorations
Worldwide Christmas traditional dishes & festive decorations, including functional presents.
End Villager Trader
Adds a new villager trader in the End, offering End-related items, including a new Shulker Armor
Dragonite Gear
This mod introduces custom Ender-inspired weapons, armor, and tools that surpass netherite in quality.
Nord's Leaf Me Alone
Allows any rideable entity with controlling it passenger to move trough leaves
Multiblocked2
Multiblocked2 is the more powerful visual custom machine/multiblock mod after mbd.
Mclogs - mclo.gs
Share your Minecraft server log directly from your server with one simple command.
Waifucraft
Adds interactive waifu companions from anime, manga, games, and other media!
RightClickHarvest Supplementaries Compat
Adds compatibility between RightClickHarvest and Supplementaries
Extra Carpets
Adds 111 new patterned carpets, such as checks, spirals, themed designs and references to other games and mods.
Battlemages [More Magic Series]
Infuse your weapons and body with magic and fight!
qrafty's End Villages
The end biome is too empty, so this dpack adds end relicts from another time/dimension! 🌔
X-RAY Java Edition
An X-Ray pack for Minecraft Java Edition that highlights ores like diamond, gold, and redstone while making most blocks transparent, allowing players to easily locate valuable resources underground.