Minecraft Java 1.21 Mods
Browse 330 free mods for Minecraft Java 1.21 — popular picks include Social Player Mobs, Common Sense, Familiar Friends.
Updated daily
Social Player Mobs
Player mobs with behaviours, items / chest interactions and motives.
Common Sense
Adds in items and recipes that are not craftable in vanila
Familiar Friends
Adds a book that can unlock special pets that grant new abilities
Unique Commands
Adds unique new commands to the game
BKCommonLib
Spigot/Paper Utility Library and Minecraft Server API
Server Sided Portals
Create custom portals and dimensions compatible with any client!
Graveyards
Wake up and fight the dead in epic battles!
more ore iron and more diamond.
More Ore introduces a richer underground experience by greatly expanding the variety and abundance of minable resources.
VR Jester API
Virtual Reality Gesture Recognition API for Vivecraft and QuestCraft

Alexandria Lib
Alexandria is a lightweight Minecraft library mod that provides shared utilities and a common foundation for other mods. It doesn’t add gameplay on its own but serves as a core dependency to make mods easier to build and maintain.
PlayerProgress
PlayerProgress is a Minecraft datapack that introduces a leveling system. Earn UP from activities like mining and combat to level up and gain new abilities and rewards.
TarkovCraft: Core
Library with core functionalities for TarkovCraft project
FacilisCommon
Library for Minecraft
Luish's Guns Crafting Add-on
Add-on for Luish's Guns that adds crafting recipes
ProgressiveStages
Fully customizable progressive stages for Minecraft with FTB Quests/KubeJS/JEI integration.
Veil Origins
When the Veil falls though the true origins of the ones you thought where friends...
Rib (Roanoke Library)
A collection of common code and tooling for Roanoke Development's mods
Rage Mod
Add "Rage" to entities. Get damage bonus on full rage.
SLM: Elements
Add an advanced elemental and elemental damage system, with direct, inverse, and static interactions and more!
Keystone Expansion Pufferfish's Skills
MMO-style skill tree expansion for Puffish Skills, adding new progression categories like Combat, Mining, Exploration, Farming, Crafting, Building, Magic and Taming.
Epic Fight x Iron's Spells: Enhanced Animations community port
Compatibility for Epic Fight and Iron's Spells 'n Spellbooks for the neoforge modloader on 1.21.1
Guns Craft: Reforged
Deep weapon customization, realistic firearms, and immersive combat.
Matthiesen Core
A library mod for NeoForge and Fabric that enables developers to create mods with a shared common codebase.
Piglet - furniture shops
Adds 300+ decorational blocks that can be bought at shops that generate throughout the world
Solstice Dynamic Seasons
Experience a living world with Solstice: Dynamic Seasons, a 14-step seasonal simulation . Features realistic weather, shifting daylight, biome-aware snow, and custom crop growth. The ultimate Minecraft atmosphere!
[TaCZ] Endless Ammo Refabricated
A comprehensive ammo library addon for TACZ that adds 36 realistic ammunition types to expand your arsenal.
Interference API
Simple library adding common mixins
Overgrown's Sync
A system for yielding new capabilities. Sync is an addon for the Apoli mod that's used primarily for the Origins mod!
Kozhin's Lib
A library mod for common utils and functions in my mods.

SimpleRPGCore
a simple RPG core mod for kubejs modpack or mods
Feywild: Library
The Loremaster in his Library will give guide books you can borrow.
fweigel-util-lib
Shared client-side utility library for my Fabric mods. Provides common rendering, storage, UI, and sound utilities.

Nixienaut
A common code Library.
Azurium : Tools - Armor
Add New Simple Material [ Azurium Tools And Armors ] [ Not OP Mod ] [ Hardcore ]
Flint
Core library for DiamondFire mods, allowing them to share systems and a common codebase.
Szura's EconomY Mod
Transform your Minecraft gaming experience with the Realistic Economy mod! This innovative mod brings a complete economic system to the block world, allowing you to immerse yourself in a captivating economic simulation as you build, explore and trade.