Neoforge Mods for Minecraft 1.21
Browse 4,500 free Neoforge mods for Minecraft 1.21 — popular picks include Auto Wood Stripper, source³, Naturally Spawning Withers.
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Auto Wood Stripper
Added automation for wood stripping mechanic in Minecraft!
source³
source-styled physics for the player (adjacent to squake)
Naturally Spawning Withers
Naturally spawns withers in the nether!
Flora Expansion
Expanding Minecrafts flora with new plants, crops, blocks and mechanics
Mechanical suffering
Modpack with little bit of everything. Create, BetterEnd and BetterNether, Ice & Fire, Born in Chaos, Cataclysm , Mowzies mobs and lot more.
tame every mob
Tame every regular Minecraft mob, control their behavior, store them in Mob Pockets, and upgrade them with custom equipment.
not_alone.jar
This is a horror mod that adds entities to your world
Better craftable cobweb
A simple mod that adds a crafting recipe to cobwebs
Source Bad Hygiene
This mod adds bodily functions to minecraft
More Essentials
This mod adds crafting recipes to items like the chainmail armor and items that should be in Minecraft.

PyroGeography
Addon that makes changes to the wildfire system of ProtoManley's weather mod and adds new environments and equipment.
MouCraft
MouCraft is a survival-RP modpack for Minecraft 1.21.1 using NeoForge. Designed for immersive multiplayer gameplay, it combines Create-based automation, town-building with MineColonies and survival mechanics.
Good Old Achievements
A mod that brings back MOST of the old Minecraft Achievements prior to 1.12

Omnimovement
Omnimovement allows you to sprint in all directions with a minor (but configurable) penalty for backpedalling and strafing. Also introduces auto step while sprinting (also configurable to disable, or enable when walking too).
RoseBackport
Adds rare classic red and blue roses to specific biomes in your world!
The Underworld Mod
A dungeon mod that adds a new massive dungeon made out of custom blocks + new swords with special effects.
3K08 (SCP-3008)
A mod inspired by SCP-3008 and attempting to recreate its atmosphere
Safe Harvest
Adds the ability to block the collection of ungrown plants
CC: VR
CC: Tweaked x Vivecraft Addon
STE
A mod that centers around mechanisms and electricity,automate and create as much as you can to gather resources faster,also whit add-ons support!
Origins Legacy: NeoForged
Fork of Origins Legacy, what fork of Origins
Lava Boat Clutch Fix
This mod restores the "Lava Boat Clutch" mechanic that got fixed in 1.21.5
Torches Burn Out
Simple and configurable torch burn-out mod adding no new items
Custom Portals Foxified
Build portals out of any block. Create two matching frames, light them with a colored catalyst, and travel between linked portals.
Ivar's Bosses
Ivar's Bosses is a mod that introduces formidable bosses to the game, featuring unique attack patterns and special summoning rituals. These ancient creatures will unleash their wrath upon anyone who dares disturb their eternal slumber.
Cobblemon - Mechanical Legends
Mechanical Legends includes Create/Create Aeronautics, all 1025 Pokémon, a currency-based economy, challenging quests, and many unique features for a deep Cobblemon experience.
Mouse Tweaks x ItemLocks Compat
Adds compatibility between ItemLocks mod and Mouse Tweaks
Mo' Pistons
Adds more variants of pistons to Minecraft!
Flight Kick Bypass
A mod to teleport player to ground when someone who is kicking from server because of flying.
log creator finder | findshit
Add the creator of the corresponding log in last.log
Alpha Craft
Go back in time, and collect resources from old minecraft!
Tectonic Layers
Stacks Nether and End layers inside the Overworld, with native layered terrain, biomes, fog, lighting, portals, and dragon support.

1.21.7 Backport (Lava Chicken Backport)
Port of the new 1.21.7 features to older versions
Zob's Mining World
Not a simple mining dimension.
Create: Geology
Focuses on adding geologically correct minerals and ores that are refined with Create and Create: The Factory Must Grow.
Void Respawn
teleports any entity falling into the Void in the End back to the Overworld