Forge Mods for Minecraft 1.21
Browse 186 free Forge mods for Minecraft 1.21 — popular picks include Lovely Robot: Reboot, Legacy Mechanics, oSzoukaua's: Realistic Spiders.
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Lovely Robot: Reboot
This mod is a reboot that adds several robots girl to Minecraft as an assistant in battles with various functionalities.
Legacy Mechanics
Brings back nostalgic mechanics and quirks from the console versions of Minecraft!
oSzoukaua's: Realistic Spiders
This pack makes spiders more realistic! and much cuter!
CobbleBuilds: Leaders [Cobblemon Addon]
Find Gyms, defeat Gym Leaders, and aquire Gym Badges to become the best there ever was
Brutal Nightmare : Insane Difficult
Minecraft too easy? Try this mods with nearly 40 modifiers - settings new mini bosses, which made minecraft become hard & insane. Enhanced hostile mobs' AI & Angry passive mob. Zombie place/break blocks. Skeleton,Spider,Creeper,Enderman.
The Bee Fix
Fixes Bee Related Bugs on both client and server side
pv-addon-sculk
With this add-on warder and skulk sensors are triggered by proximity voice chat.
No Creeper Grief
Disables that creepers destroy blocks when exploding
Too Much XP (TME)
Yeets the laggy XP orbs, whilst still maintaining a high level count

Saddle Backport
Backports the new saddle recipe to older versions of the game
Glow Squids Actually Glow
Makes glow squids actually glow!

Wind Boost Enchantment
Allows one to Enchant the Harness with a Custom Enchant to make Happy Ghasts Faster
Craft Spawn Eggs
Adds a crafting recipe for every spawm egg
Nice Mobs
Bringing in a vast variety of vanilla-style mobs and variants, each with their own quirks and abilities, to make your world feel more alive.
VillEdit
Create custom villagers with the VillEdit datapack! This is an easy custom villager creator which works without mods.
Bucketable
Put any mob into a bucket! Completely customizable!
Cybernetic System
An industrial mod in the style of the "future", which allows you to improve your genes, create implants and even create weapons. You can become a cyborg and improve yourself in different ways and use your abilities for Energy.
Shulkers Drop Two Shells
Shulkers can drop 2 shulker shells, instead of one
Injured Effects
This mod adds effects to being low on HP! This applies to players, aswell as humanoid entities like villagers, illagers, and piglins!
Silk Touch Spawners
Allows for the removal and replacement of any spawner blocks
Piglin Conservatory v3.0
Adds a news structure to the Nether, The Piglin Conservatory, along with a new Obsidian Apple, Dragon Fruit, Toxic Mushrooms, Hoglins' Fossils, Corrupted Emerald and a New Music Discs!
MC Calamity
A datapack that attempts to recreate the Terraria: Calamity Mod
RPGTitles
Small, cosmetic datapack that adds titles to small things in the game! See the dimension name when you switch dimension, see the current biome you are in and maybe get something when you kill a powerful foe..
Adrenaline Rush : Second Chance
Add "final shout" & "second chance" mechanic into minecraft! You'll have 0,5 HP instead of dying when fall from height ; Buff your power when you at low HP
Sanity: Renewed
Brings the sanity mechanic from Don't Starve into Minecraft
Cattlestrophic!
A mod introducing new mechanics on animals breeding and growth.
Create Cogs Invaders
A new mechanical presence has emerged within the world of Create.
Corner Entity
is an atmospheric horror mod that turns your peaceful Minecraft survival into a nerve-wracking experience. You will never feel truly safe again, as something is watching you from the shadows, waiting for the perfect moment to strike.
AIO - Villager Bucket
Easy villager transport and storage!! Just store him in a bucket :)
Mebahel's Skeleton Revival
When death is no longer the end… their skulls flee to rise again. Summon, hunt, or suffer — in Mebahel’s Skeleton Revival, every skeleton gets a second chance.
PerformanceX
Struggling with LAG??? Look no further! PX is an All-in-one server performance suite - 50 modules including item/mob despawn timers, AI throttling, lag machine detection, auto backups, Discord webhooks, Geyser support, and more. 1.8.8-26.2.
Robotica
Robotica is a futuristic Minecraft mod set in a high-tech world filled with advanced robots, towering mechs, and powerful sci-fi weapons
Azukaar's Fair Difficulty Overhaul
Per player difficulty, new expert+ difficulty, interesting mobs and mechanics
Deadly Enderdragon
Minecraft mod to make the Ender Dragon much more aggressive and dangerous without new mechanics.

🐟Friendly AxolotlS🐟
Axolotls wont kill your fishes anymore, they even have a new diet...
MindOfTheColony
Mind of the Colony is a mod that transforms your settlement inhabitants from silent workers into living, thinking individuals. This project moves beyond typical gameplay mechanics to answer a simple question: what are your colonists really thinking?