Forge Mods for Minecraft 1.21
Browse 112 free Forge mods for Minecraft 1.21 — popular picks include [ETF] Entity Texture Features - [Fabric & Forge], [EMF] Entity Model Features [Fabric & Forge], CleanCut.
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[ETF] Entity Texture Features - [Fabric & Forge]
Custom, Emissive and Varied mobs like Optifine and so much more.. +Player skin features!)
[EMF] Entity Model Features [Fabric & Forge]
EMF is an, OptiFine format, Custom Entity Model replacement mod available for Fabric and Forge.
CleanCut
Attack enemies through obstructions! FORGE & NEOFORGE & FABRIC!
Despawn Tweaks
Optimization mod that fixes cases where mobs will be prevented from despawning.
Immersive Optimization
A lightweight entity-tick-scheduler for doubling your TPS.
[ESF] Entity Sound Features
Allows for entity sound variation using ETF / OptiFine format property rules. Also adds aditional sound related utility for ETF & EMF
Animal Pens
Reduce lag and keep your animals neatly stored while maintaining full interactivity!
Too Many Entities
Hide extra entities in order to reduce lag, especially with mob farms. The mobs still exist in the world, they are just not visible.
Mob AI Tweaks
Tweaks certain mob AIs, major or minor. Reworks the Wither and Ender Dragon boss fights!
Easy Mob Spawn Control - spawn rate, mob cap, disable bad mobs
Quickly adjust spawn rate, ban mobs, change mob limit and more with in-game menu
Advanced Wall Climber API
A powerful API for Minecraft mods that enables advanced wall climbing mechanics for entities. This API allows mod developers to easily add spider-like wall climbing behavior to any mob.

Dynamic light
Mobs on fire and some items emit light! Like the OptiFine's dynamic light.
Find me
Find Me is a mod for storing, summoning, and managing creatures and vehicles.
Zombie Horsemen
Zombie Horsemen is a Minecraft datapack that introduces a new surprise event similar to the Skeleton Trap. When triggered, a zombie riding a zombie horse, equipped with an iron helmet, iron axe, and shield, will spawn to challenge players.
Moonlit Performance Enhancement Module
A optimization mod for Forge/NeoForge that overhauls Minecraft’s core event system. Eliminates reflection bottlenecks to accelerate event processing, enables instant language switching, and adds the /killmobs command to instantly remove all hostile mobs wi
Civillis Technology Compatibility
Adds compatibility between Civilis and various tech mods.
APTweaks: Spawn (11.x Classic)
Optimization for monster spawn events and spawner.
Mobs Blocker
Disable the spawning of specific mobs in Minecraft
Too Much XP (TME)
Yeets the laggy XP orbs, whilst still maintaining a high level count
Mob Stacker Ind.
Greatly increases performance by merging/stacking nearby mobs, reducing the physical number of entities in the world. Hypothetically 2147483646 times better performance.
Better Zombie Ai
Add all new features to improve your zombie apocalypse experience ,with tons of customizability
GpuShift
Improves optimization by offloading CPU processes to the GPU
Civillis Minecolonies Compatibility
Creates civilized areas to deter monster spawning around Colonies dynamically.
Civillis Magic Compatibility
Adds compatibility between Civilis and various magic mods.
Progressive Mob Wave Activations - PMWA - Day/trigger-based control of mob spawning!
Progressive Mob Wave Activations PMWA - Limit any mobs based on day number, registered mob kills, and distance from world centre
Tpsum
Performance optimization mod improves mob spawning, biome lookup, worldgen allocations, and task loop hot paths.
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.
Stuffed Pack!
A family friendly modpack designed with performance in mind featuring new creatures, items, biomes, and structures to explore. This is a Vanilla+ pack designed for people who are already familiar with Minecraft.
EntityOptimization
Optimization and overload protection (Entity)
Progressive Mob Wave Activations - PMWA
Progressive Mob Wave Activations PMWA - Mob spawns enable after a select number of days or after killing a specified mob
Backport Saddle & Nametag copper
Craft saddle and nametag with copper. Derivated from Balanced Recipes.
Simple Animal pens
A simple datapack that allows to store many animals in one block to reduce lag on the server. also available as datapack
Mob Lite - Discontinued
It allows you to modify the spawn limit and the spawn limit of each specific entity in real time using commands
Mob Stacker Advanced
Mob stacker mod with breeding support, etc.
SitOnEverything
Sit on almost any block or entity with configurable seat positions, vanilla presets, and quick hotkey support.
Spawnix
Control mob spawning the way Minecraft always should have, simple, natural, and in real time.