Neoforge Mods for Minecraft 1.21
Browse 540 free Neoforge mods for Minecraft 1.21 — popular picks include Craftable Light Blocks, Stuck - a backrooms mod, MinecraftContentExpansion.
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Craftable Light Blocks
Vanilla friendly light block crafting recipes, available as a mod / datapack format.
Stuck - a backrooms mod
Get lost in the Backrooms. Yellow hallways, battery flashlight, exploration map, and a hidden Async Research terminal. Inspired by Kane Pixels.
MinecraftContentExpansion
New early game, new materials, new mechanics, new tools and much more!

Ender Trails
Restores a forgotten feature where endermen leave a trail when they teleport. Also fixes the dragon egg trail being completely wrong.
Customizer Legacy! (DISCONTINUED)
Mod that allows you to put camouflages on your tools
Chekushka
Adds a 0.25 L vodka bottle with a real drunkenness effect: you weave when walking, your aim drifts, the camera sways. From the 5th bottle you throw up on the floor, from the 10th it poisons you. Bottles can be placed on the ground.
Kabachok's Painting Pack
A simple mod that adds some paintings found on PhoenixSC and Minecraft subreddits
UltimaMod
Just some ABSOLUTELY OP items (armour, sword, potions)... I really hope you enjoy playing my first mod :)
Huntr/x Discs
Adds music disc with Huntr/x songs
OK Additions
Small but useful additions. Spray Cans, Tape Measure, Jump Pads, Tomahawks, Flashbangs, Binoculars, Instruments, etc.
Cobalt of Imagination
Push and pull blocks with redstone. Cobalt Imagination comes with a whole variety of blocks and items.
SCP: Genesis
Add SCP's and more to Minecraft
Better Carpets
Turn carpets into functional floor blocks that allow placing torches, buttons and other blocks on top.
ShilkaMOD
the official mod for the TatouSMP
SkazochniyPatrol
Dive into the magical world of the animated series "Fairytale Patrol"! Meet your favorite heroines - Alenka, Masha, Snezhka and Varya, explore mysterious structures, collect the keys of the elements and go to a new dimension - the Fairytale World!
Dice-Blocks by Limo4317
There are just blocks here, one for each of the numbers 1 to 6. And then you can simply build a dice machine with a redstone mechanism.

THE OTHER
Overpowered Terrific HBM Effortlessly Reimagined
Observing Eyeblossom
Instead of blooming at night, eyeblossoms now open up when looked at by the player!
Hush
Quiets dead mobs, and fixes loud sounds.
Illusion bedrock
This mod adds illusion bedrock.
Geodemaniacal Delights
Add-on that meshes Farmer's Delight with Geode Mania's darkened depths for a dangerously delectable delight!
Minecraft But EVERY Mob Explodes!
Pretty much"Minecraft but Every Mob Explodes" lol
Independence Firework
Adds a custom firework celebrating the the 4th of July!
Don's Building Stuff
A collection of tools that makes building insanely enjoyable
Replace Mod
Enable, Break, Replace, three easy steps to replace a block you don't like with the block in your off hand!
Decomposable Nether Wart
Allows you to decompose a nether wart block
Planet Craft
A mod to create a universe with Planets, Suns and Black Holes all customizable to your liking.
Scorched Grass
Add dangerous fires by letting Minecraft grass be flammable and spreading!
Esquisse - Canvas
An Esquisse addon that adds an infinite canvas
Simply Fly
It just adds a survival command. /fly lets you fly just like creative mod for constructing.
Create: Mintage
Make Custom Currencies For Player Driven Economies
Juix Resources (mod version)
Mod enabling Juix datapacks' custom textures
Pokeballs to the Walls
Cobblemon addon that ports Gravelmon Poke Balls and adds orange and purple apricorns without the Gravelmon or GEB dependency.
Trillion O Trees
An overworld mod adding many more tree types and forests... some added structures too
Squeebs N' Stuff
A mod that adds another ender friend to your Minecraft world!
FriedZane
A mod that adds new items and bosses that relates to the minecraft youtuber "FieryZane" and adds new awesome features to make minecraft more destructive and fun!