Mods for Minecraft Java
Browse 7,373 free mods for Minecraft Java — popular picks include Temporal API, TexTrue's Rubidium Options, AI Improvements: Performance Tuning.
Step by step: How to install Minecraft Java mods & modpacks
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Temporal API
Temporal API is the library for Team Temporal mods, other projects may use it as well.
TexTrue's Rubidium Options
An unofficial fork of FlashyReese's "Reese's Sodium Options", made to work with FML.
AI Improvements: Performance Tuning
Performance improvements for vanilla AI, with the ability to turn off certain AI behaviors
DoesPotatoTick?
performance mod that don‘t allow entities to tick when they are far from players.
Bocchium
Forge port of Bedrodium, culling bedrock sides for better performance.
Leaves Be Gone
Quick leaf decay from cutting down trees. Built for fast performance and mod compat!
RenderLib
Library for entity rendering

Cull Leaves
Adds culling to leaf blocks, providing a huge performance boost over vanilla.
Gnetum
Distribute HUD updates over multiple frames to improve performance
Sodium Extras
An add-on mod for Sodium that adds new features and customization.
Cerulean
Advancements optimization mod, updated fork of Icterine with added features
Monocle
An addon that allows Iris to run shaders using Embeddium
APTweaks: Core (11.x Classic)
The core is required for all adaptive performance tweaks modules and provides a shared API, monitoring functionally, events and commands.
Alternate Current
An efficient and non-locational redstone dust implementation
ModernFix-mVUS
A fork of ModernFix that adds minor version update support.
MixinBooter
The Mixin Library for 1.8 - 1.12.2.
Fabric Capes
Lets you use capes from OptiFine, LabyMod and other cape mods

Better Block Entities
A Minecraft optimization mod for Fabric-Sodium that improves framerates by improving block entity rendering via a hybrid renderer
KubeJS Tweaks
This is an addon for KubeJS to abstract some common usage of KubeJS for heavily modded modpacks. Also applies hotfix when needed.
Better Biome Reblend
Updated version of Better Biome Blend, a mod that improves and fixes biome color blending
ThreadTweak
Improve and tweak Minecraft thread scheduling. Fork of Smooth Boot for ≥1.20
Achievements Optimizer
Improved achievement performance
Leaky - Item Lag Fix
Detects & reports too many stacked items and improves item performance
Nuit Interop
Nuit Interoperability for OptiFine/MCPatcher and legacy FabricSkyBoxes sky formats
RLTweaker2
Bug fixes, performance improvements and small features developed for RLCraft
Fast Paintings
Fixes painting rendering, increasing their performance and allowing them to have custom models

RLMixins
Minecraft and Minecraft mod tweaker and fixer for the modpack RLCraft
Icterine
Advancements optimization (specifically, InventoryChangeTrigger)
OptiFabric
A mod that allows running optifine on fabric.
Mob Despawn Timers
A mod that forces mobs to exist for a time
Ksyxis
Speed up your world loading by removing unneeded chunks.
Does It Tick?
Minecraft's dumbest server performance mod.

Fast Noise
Vanilla Worldgen optimization mod
Ixeris
Buffered raw input and threaded event polling
Sodium Leaf Culling
Smart leaf culling algorithm for Sodium on 1.21+
Not Enough Recipe Book [NERB]
Completely removes recipe book from the game, optimizing player data.