Minecraft Java 1.21 Mods
Browse 330 free mods for Minecraft Java 1.21 — popular picks include shrimpo's questing additions, SimpleCore by Cooshh, REST HTTP API.
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shrimpo's questing additions
Adds (some) markdown formatting options to FTB Quests.
SimpleCore by Cooshh
A shared core library for Simple mods, providing common systems like economy support and shared utilities.
REST HTTP API
A Minecraft Paper plugin that allows executing server commands and get various information via HTTP requests. Perfect for integrating external tools, web dashboards, or automation scripts with your Minecraft server.
Crqzy's NexusCore
Modular RPG framework for Paper servers. Adds levels, classes, skills, stats, and a developer API — designed as the foundation for addon plugins.
iammojogo's Uncrafting Mod
This mod is a mod that allows users to uncraft crafted items to gain back resources from items they don't need and don't want to throw away or burn.
Speakeasy Utilities
A shared library providing common systems, utilities, and APIs for the Speakeasy mod collection.
QinhCoreLib
Shared core library for the Qinh plugin suite. Unifies item sources (CraftEngine, ItemsAdder, Nexo, MMOItems, MythicMobs & more), attributes, custom-block & model bridges, and scripting. Required by QinhItems, QinhSkills, and other Qinh plugins.
InterdimensionalLib
Seamless mix of common utilities, systems and presets
XzCore
Shared infrastructure foundation for the XzPlugin suite. It provides common services that other plugins can depend on
Zurtrutium Lib
Common Library for Zurtrutium Modding
⭐ ZenithCore ⭐ | The Ultimate Framework for Paper Servers | Quest • GUI • API • Hooks
Modern all-in-one framework for Paper 1.21+ featuring modular systems, powerful API, plugin hooks an
![WorldScript [1.12.2-1.21.8] | ️RPG Region Framework | ⚡Dynamic Events & Player Progression⚡](https://pub-2ae937f770284535a96c3330f91236aa.r2.dev/thumb/spiget/475571.webp)
WorldScript [1.12.2-1.21.8] | ️RPG Region Framework | ⚡Dynamic Events & Player Progression⚡
Open-world RPG region events and scripting for Paper servers..
Portable API
Portable API is a cross-version, cross-loader Minecraft modding API that lets developers share common code across multiple Minecraft versions and mod loaders.
RPGItemTweaksDefaultComponents
This is a rider datapack specificly for default components mod, rebalancing the RPG series mods and the ice and fire dragonsteel weapons, for my combat modpack.
Cobblemore Lib Mod (1.21.1, 1.20.1) – Library for Cobblemore_Studio's Mods
Cobblemore Lib Mod is a shared library used by several mods from Cobblemore_Studio. It stores common resources such as items, assets, recipes, and code so they can be reused across multiple mods. Some of the developer's mods require this library to function. Features: Stores shared items, assets, recipes, and code. Allows multiple mods to use […]
Aaron Mod (1.21.1, 1.20.1) – Code Library
Aaron Mod is a library mod created by the developer Aaron that provides shared code for many of their other mods. This mod reduces duplicated code across multiple projects by including common utilities and helpers in one place. Aaron is not a standalone mod – it's a required dependency that other mods use to function […]
Cobblemon Tim Core Mod (1.21.1, 1.21) – Essential Library For Pokemon Modding
Cobblemon Tim Core Mod serves as a shared codebase to reduce code duplication across the developer's Cobblemon-related mods, providing common utilities, fixes, and extensions. It's essential for modpacks using multiple "Tim" Cobblemon addons, ensuring consistent behavior and performance. Features: Base classes for mod structure and config handling. Simplified config creation with overridable settings. Tools for […]
Epic Fight Avalon Mod (1.21.1, 1.20.1) – Unlock Custom Combat Animations
Epic Fight Avalon Mod expands the Epic Fight mod with a shared library of code. It holds common animation files together so other addons do not need to repeat the same work. This addon brings a fresh way to load frame-by-frame attack animations. It also packs in special tools to check for damage on multiple […]
Strawberry Lib Mod (1.21.11, 1.21.5) – Common Code Library
Strawberry Lib Mod is a library mod developed by the popular mod developer Moriya Shiine. Many of the mods created by this developer require Strawberry Lib to be installed alongside them. As a library, the mod by itself does not introduce any new content into the game, but it facilitates an environment that makes mod […]
Brandon's Core (1.21.1, 1.20.1) – Power Up Your Modded Game
Brandon's Core is the core mod that will be used by most of brandon3055's mods. It provides base ASM functionality and contains common classes. Features: Acts as a required library for other mods like Draconic Evolution to function. Contains a collection of common code and classes that other mods can share. Provides base classes for […]
GTBC's Spell Lib Mod (1.21.1, 1.20.1) – Centralized Spell Library
GTBC's Spell Lib Mod is a developer-focused library mod designed to streamline the creation of add-ons for Iron’s Spellbooks (ISS). Features: Provides a shared library to simplify the development of Iron’s Spellbooks add-ons. Eliminates the need to manually copy common ISS elements across different add-ons. Designed for mod developers to streamline spell and magic-related content […]
CarrasconLib Mod (1.21.1, 1.20.1) – The Key to Running New Mods
CarrasconLib Mod provides a shared set of tools that other mods need to work correctly. It is a library mod that organizes common code, helping other additions run smoothly. You will need to install this mod for other specific mods to function in the game. Features: Acts as a shared library, providing common tools for […]
Night Auto Config Mod (1.21.1, 1.20.1) – Night Config Integration for Auto Config
Night Auto Config Mod is a Night Config integration for Auto Config, which is now embedded in the Cloth Config API. This config introduces a “NightConfigSerializer” to satisfy Auto Config's requirement of a serializer's implementation. You can choose from all the available config formats of Night Config, and use the serializer just as other common […]
Fireplace Lib Mod (1.21.8, 1.20.1) – Library for The_Fireplace's Mods
Fireplace Lib Mod is a library of common functionality used by The_Fireplace's mods, in one place for easier maintenance and faster updates. Features: Multithreading (Allows more things to happen at once). Serializing and deserializing data (Makes it easier to save various data and create config files). Translation management for client-side-optional mods (Makes it so even […]
BjornLib Mod (1.21.1, 1.20.1) – Core Library For Mob And Effects
BjornLib Mod is a core library mod by FuriusMaximus, providing shared functionality for several of their mods, such as Dragon Mounts: More Dragons. It includes useful utilities and systems designed to streamline gameplay enhancements. Features: Ability Registry and custom ability events Particle Builder with magic-style glowing effects Lightning Builder for custom lightning visuals Leveling Builder […]
Satako Library (1.21.1, 1.20.1) – UI System, Various Functions
Satako Library is a library for Forge modding. It contains various useful things, UI system and various functions. It also adds 3 commands to the game: give2, summon2 , fill2 which let you specify namespace and path of the arguments separately. Features: Minecraft-related constants, including colors and their codes. Custom user interface components (button, switch-button, […]
Chimeric Lib Mod (1.21.5, 1.21.1) – Shared Library With Common Code
Chimeric Lib Mod is a shared library mod developed by chimericdream, designed to provide common code and utilities for their suite of Minecraft mods. It is essential for ensuring consistency and ease of maintenance across various Minecraft versions. Features: Provides registry and data generation helpers for mod elements Includes color utilities for managing dyes and […]
Tslat Effects Lib Mod (1.21.5, 1.20.1) – Advanced Effect Handling
Tslat Effects Lib Mod is a library mod that provides shared code and effect-handling systems for other mods, particularly those requiring advanced particle effects, visual rendering, and status effects. It’s designed as a backend dependency, not meant for standalone use, and is commonly used by mods in the Tslat ecosystem. Features: Adds support for custom […]
Mysterious Mountain Lib (1.21.1, 1.20.1) – Library for Syameimaru Zheng's Mods
Mysterious Mountain Lib is a library for the mods in MMF group, it's a efficient tool for the coder who want to jump-start into the world of modding. The API accommodates a plethora of features ranging from meta-hacked items to Item and Block Models. Feel free to utilize the API as much as you want, […]
GottschCore (1.21.1, 1.20.1) – The Key to Dungeon Quests
GottschCore is a new base library (API) that is used in all of gottsch's mods. This is a replacement of ModUtilsAPI. Features: Acts as a shared code library (API) that other mods need to work. Replaces the older ModUtilsAPI with a new base. Allows mods like Treasure2!, Legacy Vault, and Dungeon Denizens to run in […]
Titanium Library (1.21.1, 1.20.1) – Library for HRZNStudio's Mods
Titanium Library is a library mod which adds shared common code that all horizon mods use. This mod provides nothing of value without another mod activating it or using it. Titanium Library Download Links For Minecraft 1.21.1, 1.21 NeoForge version: Download from Server 1 – Download from Server 2 For Minecraft 1.20.1, 1.20 Forge version: […]
HammerLib Mod (1.21.4, 1.20.1) – The Shared Code That Powers Your Modpack
HammerLib Mod provides a collection of useful tools and code that other mods need to work. It acts as a shared library, making it easier for modders to create new content and features for Minecraft. By handling many common tasks, this mod helps other mods run smoothly and work together. Features: Helps modders register new […]
Cosmos Library Mod (1.21.1, 1.20.1) – Dependency for The Cosmos Mod Series
Cosmos Library Mod is a collection of helper functions designed to make creating Minecraft mods quicker. It doesn't add any new features to the game itself. Instead, it serves as a base for other mods, allowing developers to avoid duplicating common code. This mod is part of The Cosmos Series by TheCosmicNebula and is required […]
More RPG Library Mod (1.21.1, 1.20.1) – Library for the More RPG Classes
More RPG Library Mod is a library add-on for the Spell Engine Mod that expands its functionality with new content and Features. Features: On its own this Mod does not add spells, you need to install the class mods you want to add spells to your game This mod is used mainly as a library […]
Lodestone Mod (1.21.3, 1.20.1) – Library for Lodestar Team's Projects
Lodestone Mod is a library used by all mods under the Lodestar team, containing important backend code mostly used for rendering. Features: A lot of shaders Various helper classes & utilities. A simple screenshake implementation. Some commonly used attributes in Lodestar Team's mods. A system allowing for custom fire effects applied to entities. A particle […]
Knight Lib Mod (1.21.1, 1.20.1) – Expand Your Modding Toolkit
Knight Lib Mod is a code library that serves as a shared foundation for mods developed by its creator. This library mod introduces a key feature, the "Great Chalice" block, along with several utility functions that simplify adding common elements to custom mods. Features: Adds the "Great Chalice" block Provides utilities for mod development Designed […]