Forge Mods for Minecraft 1.21
Browse 5,334 free Forge mods for Minecraft 1.21 — popular picks include More Decorations [FORGE] - 1.21 UPDATE!, YDM's Custom Camera View, Unofficial Iron's Spells 'n Spellbooks Skill Tree.
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More Decorations [FORGE] - 1.21 UPDATE!
An incredible modpack designed for decoration lovers, although it adds much more vanilla+ content...
YDM's Custom Camera View
You can change the camera position, rotation or just make the camera stop following you.
Unofficial Iron's Spells 'n Spellbooks Skill Tree
This mod uses the Pufferfish's Skills Template to add a simple skill tree

Speed Happy Ghast
adds the speed effect to the happy ghast
X-RAY Unlimited Forge
Just X-RAY and a few of things Forge supported
MineColonies: Block Party
Musical Stylings for the MineColonies: Dimensional Adventure Modpack
Decorative Railings
Railings to decorate your balconies and terraces
Pottery (Additional Pots)
Pottery adds new decorative pots and some quality of life improvements!
Animal Garden - Meerkat
Adds tamable meerkat into the game, that will fight and protect you.
Tinted Sands
Dyeable Sand Blocks

Dynamic light
Mobs on fire and some items emit light! Like the OptiFine's dynamic light.
Peyro's Scythes & Spells
An Iron's Spellbook Addon, adding Transformable Scythes and some Spells from one of my favourite light novel.
End Of Mending
Removes mending and rebalances repair cost in order to extend the gather/repair gameplay loop into the late-game.
Resource Gamma Util / Fullbright
Gamma / Fullbright, making it easy to see in the dark.
Threads
Performance tweaking mod that allows to change priority of running game threads.
Whaleborne
Adds a new hullback mob and pirate ship mechanic
Mahou Tsukai Combat
Adds Better Combat support for Mahou Tsukia.

Ember's Underground Rooms
New underground dungeons with varied rooms, treasure and enemies! Now with achievements!
Animal Garden - Mouse
Adds tamable mice into the game, that will fight and protect you.
Ziplines: Rezipped!
A multiloader fork of Zipline: Satisfactory inspired ziplines in Minecraft!
Fungi Delight (Farmers Delight Addon)
An addon mod for Farmer's Delight that expand it with a variety of new mushrooms, features and food.
Immersive Vehicles - Official Automobile Pack - [OAmP] - Best Cars Race and new cars Ultimate Drive
An expansion pack adding various immersive cars to the game!
Zulu's Simple Recipes
Adds Quality Of Life recipes that will make your life easier!
Let Me Sleep - Better Sleep Check
Because getting a bed can already be hard enough.
Pathfinding Edition For MineColonies
Struggling with MineColonies’ AI? Install this addon to greatly improve your city-building experience!
Avaritia : Expand
Added more items to Re:Avaritia

Unnamed Framework
The base framework for my datapacks, providing an API of common functions and easy compatibility between modules.
Dynamic Trees - Regions Unexplored
Compatibility Mod between Dynamic trees and Regions Unexplored
Him - Herobrine
we do a little trolling
Fabrica Resonantis:Shelomoh
Adds a weapon path: Shelomoh to the game.
WorldEdit Items
Does it bother you that WorldEdit uses native objects in Minecraft and ruins the gaming experience? this mod is just for you
AStages
Restrict nearly every aspect of gameplay based on progression.
Sophisticated Backpack Allthemodium Tier
Allthemodium equivalent upgrades of sophisticated backpack mod
Vestiges of the Present
Hardcore challenges awarded with powerful and unique Vestiges from unknown God-like creature. Has worldwide leaderboards, lore progression and a lot of cool stuff like anti heal, heal debt, shields, over heal and shields, etc.
Structures+ — Better Structures & Exploration
A comprehensive mod that adds beautiful structures to your game
Applied Pneumatics
An add-on connects AE2 and Pneumatic Craft.