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Minecraft Java 1.21 Mods

Browse 3,576 free mods for Minecraft Java 1.21 — popular picks include Void Lib, ShiftedLib, Modern Networking.

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Void Lib
1.20.1forge

Void Lib

A lib that adds various utilities to mod development

237kdownloads
ShiftedLib
1.21.11fabric

ShiftedLib

My personal library that used by my mods.

236kdownloads
Modern Networking
1.21.8neoforge

Modern Networking

Multiversioned and multiloader network packet API based on 1.20.6+'s method of packets.

235kdownloads
Modulation
1.21.1fabric

Modulation

A growing collection of quality-of-life tweaks, bug fixes, and cross-mod integrations for modpack creators!

234kdownloads
NightCore
1.21.8

NightCore

A lightweight library with a wide range of utilities and tools for faster and more efficient plugin development.

234kdownloads
Unknown5473lib
1.21.4neoforge

Unknown5473lib

A universal code library prerequisite for mods created by Unknown5473,Provides a Boss mob template library and screen effects..

233kdownloads
MomentariyModder'Applications
1.21.1neoforge

MomentariyModder'Applications

Core for MomentariyModder mods.

233kdownloads
Zigy's Player Animator API
1.21neoforge

Zigy's Player Animator API

API for playing player animations from server side.

230kdownloads
Strut Your Stuff (Library)
1.20.1forge

Strut Your Stuff (Library)

Library used for spanning blocks, features collisions, interactions and so on in an accessible and reusable library.

229kdownloads
S-Lib
1.21.1fabric

S-Lib

A core utility library providing shared code for Stalemated's mods.

226kdownloads
KubeJS Diesel Generators
1.21.1neoforge

KubeJS Diesel Generators

Create: Diesel Generators integration for KubeJS

225kdownloads
SolLib
1.21.1neoforge

SolLib

Lets mods shine by bringing a constellation of (mostly) data utilities.

224kdownloads
Flight API
1.21neoforge

Flight API

A simple, zero-dependency API for flight controlling and detecting mods that break flight.

224kdownloads
Custom Tooltip API
1.21.1fabric

Custom Tooltip API

Data-driven tooltip text creation.

223kdownloads
Apothecary - Potion Expansion
1.21.1neoforge

Apothecary - Potion Expansion

A potion expansion with a large variety of different effects!

223kdownloads
Prometheus
1.21.11neoforge

Prometheus

🔥 Backbone of modded fire 🔥

221kdownloads
Sketch
1.21fabric

Sketch

A library for Team Abode's mods.

221kdownloads
Player2 AI NPC
1.21.1neoforge

Player2 AI NPC

This is not just another companion mod; it is a live showcase of the PlayerEngine framework, built to fundamentally change our perception of AI NPCs in Minecraft.

216kdownloads
COLib
1.20.1forge

COLib

Commonly used Ores

215kdownloads
[Discontinued] ChassisCore
1.20.1forge

[Discontinued] ChassisCore

Core for creating exoskeleton armor

213kdownloads
Skniro's Furniture
1.20.4forge

Skniro's Furniture

Skniro's furniture mod introduces a wide range of furniture while keeping the original Minecraft aesthetic.

209kdownloads
HutosLib
1.21.1neoforge

HutosLib

A Library Mod

204kdownloads
Craftable Elytra [Remastered]
1.21.3forge

Craftable Elytra [Remastered]

A not official 1.16+ version of craftable elytra mod from shmeggels

198kdownloads
Night Auto Config
1.21neoforge

Night Auto Config

Serialize everything! Night Config integration for Auto Config.

197kdownloads
GooeyLibs
1.21neoforge

GooeyLibs

A user-interface based library useful for creating front-end UIs for existing game screens on both Forge and Fabric

196kdownloads
Moff's AddonAPI-DynLoad
1.21.1neoforge

Moff's AddonAPI-DynLoad

A library mod that provides an API for dynamically loading objects in addon mods based on the mods loaded by Forge.

196kdownloads
Integrated REST
1.21.1neoforge

Integrated REST

Expose Integrated Dynamics networks as a REST API

193kdownloads
Ars Sable
1.21neoforge

Ars Sable

A compatibility mod for Ars Nouveau and Sable sublevels.

190kdownloads
Just Utilities
1.21fabric

Just Utilities

A personal use Multiloader Library

185kdownloads
BBL Fixes
1.21.1neoforge

BBL Fixes

Contains some fixes to mods and mod interactions

183kdownloads
No More Useless Keys - NMUK (Fabric)
1.21.8fabric

No More Useless Keys - NMUK (Fabric)

Allows you to add alternative key combinations to every key binding!

181kdownloads
Modern UI mVUS
1.21.11neoforge

Modern UI mVUS

UNOFFICIAL Fork of ModernUI-MC to add minor version update support.

180kdownloads
pv-addon-soundphysics
1.16.5fabric

pv-addon-soundphysics

Compatibility add-on for Plasmo Voice and Sound Physics Remastered mod. With this add-on Plasmo Voice will be affected by Sound Physics.

180kdownloads
Easy CraftTweaker
1.21.1neoforge

Easy CraftTweaker

Gui for Craft Tweaker that allows you manage your recipes with ease.

179kdownloads
Better Combat Extension
1.21.1fabric

Better Combat Extension

Extends the mod 'Better Combat' with additional functionality.

179kdownloads
Potion Core Reborn
1.21.5neoforge

Potion Core Reborn

Revives Potion Core and bring it to modern versions

178kdownloads