Forge Mods for Minecraft 1.21
Browse 816 free Forge mods for Minecraft 1.21 — popular picks include Turtle Scutes Fall Off│龜甲脫落, Cozy Server Kit, Stellar Nullius.
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Turtle Scutes Fall Off│龜甲脫落
Turtles occasionally drop Turtle Scutes, not just when they grow to adulthood.│海龜偶爾會脫落龜甲,而不僅在它們成年時。
Cozy Server Kit
Lightweight server utilities for small survival servers: land claims, death chests, homes/TPA, starter kits, and more.
Stellar Nullius
Interstellar travel in style
Potion Imbuement
Similar to tipped arrows, you can now imbue effects onto melee weapons using lingering potions, which will apply the effect to the targeted entity.
Mini Ender Chest
Adds a cheaper, smaller version of the Ender Chest, entirely in a datapack
CrystalForge
Forge your legend across dimensions with crystals of extraordinary power.
Emeralds Galore
Emerald Ores and Zombie Villagers drop more Emeralds
BinSlot
This mod adds a trash can slot to your inventory, allowing you to quickly and safely dispose of unwanted items. Type "/trash" in chat to open the new inventory with the new bin can slot.
Perma Pumpkin Head
Players will permanently wear a carved pumpkin on their heads, even after dying with the keep inventory gamerule disabled.
No Duping
Various toggles for disabling dupes (rails; carpets; tnt; gravity blocks; tripwire hooks).
Expensive Nametags
Makes Nametags craftable and more expensive in Vanilla.
Barrier Shield
Adds a shield for admins that makes you immune to damage
Item Pickup Toast
A lightweight Minecraft Forge mod that displays recently picked up items directly on your HUD. Never lose track of what you've collected again!

Call Your Friends│呼朋引伴
Use your goat horns to call your animal friends.│使用山羊角來呼喚你的動物朋友。
You Can't Sleep
A about bed sleep's horror mod
Thanatos Echo
A paranoia mod that adds agony and fear of death.
Slimes Everywhere
Allows Slimes to spawn at night in any biome
Cheaper Spyglasses
Makes the spyglass use Glass instead of amethyst.

Redslate
Use other stones, namely cobbled deepslate and blackstone, to craft redstone components like pistons and observers that usually can only be crafted with cobblestone.

Nautilus Drops│鸚鵡螺掉落物
Nautilus will drop items when killed in any way.│鸚鵡螺無論以何種方式被擊殺都會掉落物品。
No Equipment Drop
Possibility to remove equipment drop from mobs
Zet's Grace: Repair Equipment
Recipes for repairing equipment, added item data is not lost.
Overlooked
Overlooked is a Minecraft mod that adds new uses, recipes, and mechanics for items and systems that are already in the game but usually go ignored. Hence the name, features that I believe were 'overlooked', to make it more immersive, and fun!
More Reasonable Recipes
More Reasonable Recipes in Minecraft
Nafe's End Update
My take on an end update.
Simple Logics
This Mod Adds Bunch of LOGICS to Minecraft!
iammojogo's Time Control
This mod is meant for servers but can be ran on clients also. It controls the time
Potion of Combat Log
Combat logging is now a feature, so it's not cheating!
Flower Bed
Adds a Flower Bed block that lets you quickly duplicate flowers using bone meal.

Camille's Cheaper rails
This datapack tweaks the recipes of all vanilla rails by making them cheaper and thus more worth to use. I recommend to pair this datapack with a mod that boost minecarts speed as well.
Healthy Eye (Chat Mod)
Client-only Forge mod that strips all chat colors/formatting for easier reading. Toggle on/off with the /toggleChatColor client command.
Handyman
A simple quality of life datapack that adds interactive block features like fence stripping, breaking wall connections, and trimming mossy blocks.
"Harder" Flower Pots
Flower Pot is now... harder to craft..?
Stone Lock
Hard mod that kills way to achive iron
Climbable Powder Snow
makes it so you can climb powder snow
Quality of Recipes [QoR]
Adds 90+ Recipes that will make your gameplay slightly better and more convenient.