Minecraft Java 1.21 Mods
Browse 157 free mods for Minecraft Java 1.21 — popular picks include Nutlet, MysticLib, SimpleCore by Cooshh.
Updated daily
Nutlet
A Datapack API that focus on creating Multi-block Machines. It provides schematic displays, simple enhanced /schedule, utilities for handling block orientation, UUID conversion, in‑game adjustable setting.
MysticLib
Core shared library for all Mystic Minecraft plugins — provides database pooling, logging, plugin registry, and utilities.
SimpleCore by Cooshh
A shared core library for Simple mods, providing common systems like economy support and shared utilities.
Speakeasy Utilities
A shared library providing common systems, utilities, and APIs for the Speakeasy mod collection.
Fools Rise Tweaks
Small mod for Fools Rise modpack! Added progression for modpack and some more!
JakeLib
JakeLib is a small Fabric helper library for Minecraft mods, offering reusable utilities for inventories, item stacks, text, colors, timers, cooldowns, math, strings, and shape template data. It includes a /jakelib command to confirm the mod is loaded.
Binding Agent
A library mod for some useful cross platform utilities.
LampLib
Provides utilities for my mods.
QinhCoreLib - Core Library for Qinh Series Plugins
Shared core library providing APIs, bridges, diagnostics and runtime utilities for the Qinh plugin e
InterdimensionalLib
Seamless mix of common utilities, systems and presets
EssentialsExpertAIO
EssentialsExpert is a high-performance, modular core suite for Paper 1.21.1 that consolidates essential server management, player utilities, and economy features into a single, highly customizable framework.
ALYBH-RE PVP-Lite
PVP visual modify, an additional part of ALYBH-RE, also could be used without any dependency.
VanillaTweaker » Small changes, big improvements!
Qulaity of life tweaks for an improved vanilla experience.
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 […]
ToadLib Mod (1.21.11, 1.20.1) – Library for Mrtoad's Mods
ToadLib Mod is a utility library designed to support all mods created by Mr.Toad. It contains a set of utilities, custom config, abstractions and more. Features: Property utils Integration utils Block And Item utils World-Gen utils Entity Abstractions Entity utils Java utils Custom config And more ToadLib Mod Download Links For Minecraft 1.21.11 Fabric/Quilt Version: […]
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 […]
Mechanomania Core Mod (1.21.1) – Library for Mechanomania Modpack
Mechanomania Core Mod is the core mod for Mechanomania modpack. It manages internal features and provides improvements that make the modpack run more smoothly and consistently. Features: Mods compat Mod tweaks Vanillia Tweaks Optimizations New Recipe types New advancements New items Mechanomania Core Mod Download Links For Minecraft 1.21.1, 1.21 NeoForge version: Download from Server […]
Haybale Mod (1.21.8, 1.20.1) – Registration, Networking, And Platform Services
Haybale Mod is a multiloader library mod designed to provide shared systems used across the author’s other Minecraft mods. Features: Designed specifically for multiloader mod development Annotation-based registration for entities, items, particles, and sounds Built-in packet system for networking Entity capability system support Platform-sided services such as server scheduling utilities Haybale Mod Download Links For […]
Tweakeroo Update Port Mod (1.21.11, 1.21.1) – More Control, Better Building
Tweakeroo Update Port Mod is a versatile client-side mod packed with quality-of-life tweaks. From Accurate Block Placement to Free Camera and Gamma Override, this mod gives you fine-grained control over your gameplay. Features: Popular tweaks include: Hand Restock. Flexible/Accurate Block Placement. Fast Click (left/right) Gamma Override (see in the dark) Free Camera mode. Fully client-side; […]
Combat Plus Core Mod (1.21.11, 1.20.1) – Compatibility Layer for The Combat Plus Series
Enter the realm of boundless combat possibilities with Combat Plus Core Mod, the essential library mod and compatibility layer that serves as the backbone of the Combat+ series. Designed to seamlessly integrate with a myriad of other mods, this core library facilitates an unparalleled level of inter-mod compatibility, ensuring that any mod utilizing its utilities […]
MaLiLib Community Updated Mod (1.21.11, 1.21.3) – Configuration And GUI Library
MaLiLib Community Updated Mod is a community-maintained continuation of MaLiLib, a library mod that provides shared client-side code for Masa’s mods. It includes configuration systems, keybind handling, GUI components, and general utilities, allowing dependent mods to remain functional through community updates distributed via CurseForge. Features: Provides shared client-side code used by Masa’s mods Includes configuration […]
Lazr's Lib Mod (1.21.1, 1.20.1) – The Engine for Lazr's Mods
Lazr's Lib Mod provides the shared code and tools needed for other mods to work properly. It is a library mod, which means it doesn't add any new content to the game by itself. You only need to install this mod if another one requires it. Features: Includes tools for drawing custom screens. Offers utilities […]
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 […]
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 […]
Atlas Lib (1.21.1, 1.20.1) – Library for Smileycorp's Mods
Atlas Lib is a library for shared code between Minecraft mods. This mod does nothing if installed by itself, and only exists as a dependency for other mods. Features: Various utilities to streamline the registering of sets of items and blocks. Various utilities to handle the rendering of models. Various utilities related to entity and […]
TenshiLib Mod (1.21.1, 1.20.1) – Useful Hooks and Functions for Modder
TenshiLib Mod is a library mod that contains shared codes, utilities for most of my mods to ease modding. For users having this mod alone will do nothing. For modders it contains useful things like an entity animation system, various utility methods or tools to create weapons with aoe attacks or increased range. TenshiLib Mod […]
RFTools Utility Mod (1.21.1, 1.20.1) – Tons of General Tools and Utilities
RFTools Utility Mod is the newest version of the original RFTools with tons of general tools and utilities. This is still alpha and currently only contains the teleportation system and the crafter. This mod is intended to be used together with RFTools Power and depends on RFTools Base and McJtyLib. Features: It contains the following […]
GTBC's Spellbooks Mod (1.21.1) – More Spells, No Hassle
GTBC's Spellbooks Mod offers new unique spells without requiring any extra dependencies. This mod is a cut-down version of T.O Tweaks: Iron’s Spells Addo. Features: Adds new, unique spells that integrate seamlessly with Iron’s Spells 'n Spellbooks. Does not require any additional content mods, keeping it lightweight and dependency-free. Designed for players who prefer a […]
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 […]
Sparkweave Engine Mod (1.21.3, 1.20.1) – Library for UpcraftLP's Mods
Sparkweave Engine Mod is a library mod to share code and functionality between UpcraftLP's Mods. Features: Registration helpers GUI utilities Package context annotations Automatic loading of environment variables from a ".env" file Sparkweave Engine Mod Download Links For Minecraft 1.21.3, 1.21.2 Fabric/Quilt version: Download from Server 1 – Download from Server 2 NeoForge version: Download […]
CoolCatLib Mod (1.21.1, 1.20.1) – Essential Library
CoolCatLib Mod is a utility library mod for Minecraft, specifically designed to help other mods with essential features and shared functionalities. It provides developers with a set of tools that can be easily integrated into various projects, saving time and improving mod compatibility. Features: Shared Utilities: Offers common tools and functions to simplify mod development. […]
Paucal API Mod (1.21.1, 1.20.1) – A Link between Mods
Paucal API Mod is a library Mod that places significant emphasis on bridging famous Petrak's Mods, allowing them to be compatible with each other. Paucal mainly serves as a backend for Petrak's Mods, thus providing players a better experience. At the same time, players get to utilize useful backend utilities to make their gameplay more […]
Ultreon Modding Library Mod (1.21.1, 1.20.1) – Library for Ultreon Team's Mods
Ultreon Modding Library Mod provides essential tools and utilities for Ultreon Team's Mods. Ultreon Modding Library Mod Download Links For Minecraft 1.21.1, 1.21 NeoForge version: Download from Server 1 – Download from Server 2 Fabric version: Download from Server 1 – Download from Server 2 For Minecraft 1.20.4 Forge version: Download from Server 1 – […]
DeftuLib Mod (1.21.1, 1.20.1) – The Backbone of Deftu's Creations
DeftuLib Mod is a compact but powerful library that lays the foundation for an array of extraordinary mods by Deftu. As the backbone of Deftu's creations, this mod seamlessly integrates essential libraries and utilities, elevating your gameplay experience to new heights. Uncover the potential within the intricate framework of DeftuLib, as it paves the way […]
Andrew's Datapack Utils
Useful utilities for datapacks, such as a calculator and allowing player data modification, and more.