Minecraft Java 1.21 Mods
Browse 330 free mods for Minecraft Java 1.21 — popular picks include Achievement & Quest Tab, Brick Lib API, Cludos Rupee Counter.
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Achievement & Quest Tab
Comprehensive progress tracking system that displays achievements (advancements) and quests in player tab list with full FTB integration.
Brick Lib API
Provide a common set of APIs to develop minecraft mods
Cludos Rupee Counter
Adds a Zelda inspired rupee counter to the bottom of the screen but for emeralds
Effective Armors
A data driven mod for modpack makers to add extra effects of armor sets.
Kage Library
Provides shared modules and common functions for various Minecraft mods.
BorukvaUtils
Common library for polymer-based mods
Loot Bags
Valuable loot bags integrated throughout your Minecraft world!
CRNet
Shared networking library for Createrington mods. Provides a common HTTP client, JWT authentication, and request queue.
CombatProperties
Adds an attribute-based combat system that enhances battles with critical hits, blocking, evasion, and full modding API support.
ai-assistant
Adds an in-game AI assistant that answers your questions using Mistral. Use /ask to chat directly from Minecraft.
Slayer Quests
Serverside mod that allows Nitwits to assign OSRS slayer style quests, also works as a library for adding quest functionality to your own mobs
The Crafting Collective
an RPG magic and mechanical style modpack meant for exploration and player empowerment.
OP Blocks MOD For Java Edition
Every block you break is OVERPOWERED! Massive drops, diamonds, explosions and OP effects on every break!
Player Abilities
Adds an extensive and customizable ability framework to grant players active, passive, and triggered abilities.
Common Signals
Minecraft datapack library aiming to make in common several selectors to improve optimization
Refined Enchanting
Level up your gear! Refined Enchanting adds RPG stats, tool badges, sleek tooltips, and a robust API for modders.
datattributes
Adds "fake" attributes with a datapack, Great for RPG's, Read description
Visually Optimized
A collage of vibrant cultures, seasons with the serenity mod, optimisations with sodium and libraries along with inbuilt library to search between and surf through Modrinth from inside Minecraft. Now with a little tweaks in name and other stuff.
Wilds Regrown Api
A common API for all WildsRegrown mods.
Epiphany - Modular Skill Tree
A Data-driven Modular Skill Tree API mod
Aetheria: Age of Oblivion
This is a Dark Fantasy RPG-style compilation with an emphasis on complex combat, exploration of dangerous dungeons, and magic.
ProfessorAdamMoneyPlugin
A money currency provider compatible with Vault.
Aerlib: Shaders
Readds the old secret setting shaders to 1.21.1's files. Originally meant for the Origins mod, but works as a general library.
Place Anywhere Core
A Minecraft mod that allows blocks to be summoned, stored, and rotated at non‑integer grid positions. This mod is still in early development and has many bugs.
GenericCodeLibrary
Contains the common code used in most of KSmc_brigade's client-side mods.
One Block To End All One Blocks
Quest-driven one block survival for Fabric 1.21.4. Break your block, earn drops, complete quests, advance through 6 phases. Multiplayer-ready with team islands and bridge merging. Requires Fabric API.
vJourney
A powerful custom advancement engine designed to guide players, track completed missions, and create immersive quest-trees.
swrpgservauth
ShortWlfs RPG Framework, Custom Server Authentication Security Whitelist
Event UI
Custom quest & UI system for servers rendered client-side via Fabric.
Buckshot's RPG Combat Attributes
Welcome to a complete surgical rewrite of Minecraft's combat, physics, and magic mathematics.
Web Requests
Allows you to make get and post requests with commands
InjectLib
A library that adds custom methods to commonly used Paper/Bukkit classes, such as Player.
DeathCode
A death compensation system with Discord integration. Players receive unique codes when they die and can request their inventory back through Discord with video proof.
RefinedLib
Common code library for "Refined Studios"-Projects
CipherLib
A project containing common code across my mods
Chroma
A Collection of code commonly used in Nitron's heavily rendering focused mods.