Minecraft Java 1.21 Mods
Browse 87 free mods for Minecraft Java 1.21 — popular picks include Simple Client Base, Slashbridge, Mansioneer.
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Simple Client Base
This library mod added a module management system for Minecraft.
Slashbridge
serverside utility mod aiming to add in minecraft commands that I think the base game lacks, bridging datapack and mod function.
Mansioneer
Adds biome-specific variants for Woodland Mansions; easily expandable with data packs!
MHDF-Tools
MHDF-Tools | Dream Tools | ✨ A lightweight portable high performance Bukkit base plugin ✨MHDF-Tools | 梦之工具 | ✨一款轻量化便携高性能的Bukkit基础插件✨
Networked
[BETA] A simple library for building cable-like networks server-side.
Mansion D RPC
Easy to configure to make your Discord Rich Presence better.
KF Paintings
57 new paints to decorate your base !
SkyeNetwork Velocity
The custom velocity plugin used to building SkyeNetwork
Sophie's Better Tables
Revamps loot tables and recipes with various mods and even base Minecraft itself!
Tiny DataLib
This project is a library with useful utilities such as a database system and more.
GlobalMarketplace – (Paper) Auction House - Geyser Support
Cross-server Auction House for Paper with anti-dupe, Vault economy, and Discord support.
LifeBase
An unofficial remake of Grian's Third Life series which can be modified or played standalone.
ServerSideBuilds Plugin
ServerSideBuilds is a clientless, zero-dependency Minecraft construction zone simulator that projects holographic block blueprints directly to any standard player client. It streamlines survival building with real-time placement verification, etc...
Jake's Economy
A dynamic player-driven economy mod with a live market, coin currency, real-time price trends, and an Auction House.
SecondDawnRP
SecondDawnRP is a sci-fi roleplay framework mod for Minecraft that adds advanced building systems, functional ship components, and interactive tools to support immersive crew-based starship gameplay and custom events.
NxCodex
Codex is a Minecraft plugin offering an interactive menu of areas to discover, with timed teleportations based on the player's rank. 🔗 Dependency: HeadDatabase ⭐ Recommended: LuckPerms 🧩 Compatibility: Minecraft 1.16.5 → 1.21.x
GlobalMarketplac
Cross-server Auction House for Paper with anti-dupe, Vault economy, Discord support and built in Geyser Support.
Life Is Strangeous
This mod is inspired by Life Is Strange. There is 25 Discs, 6 paintings and lighthouses. The discs can be obtained by recipe, drop and trades.
Solariae Management CNIS Plugin
Exclusive Solarian Community Plugin for MySQL Database Documentation Management.
TheFourLeafCollective
A modpack made to specialize in four main archetypes, tech, magic, exploration, and building!
HueFinder
HueFinder adds a clean in-game menu to browse and search color palettes for creative building.
Grimm's Mod Base
Base mod for the Grimm's modernized series, now including lattes (?). General content expansion and adventure mod.
MysticLib
Core shared library for all Mystic Minecraft plugins — provides database pooling, logging, plugin registry, and utilities.
Ruby Horizon Lib
Base lib for Ruby Horizon plugins
AuctionX
A modern, fully customizable auction house plugin with per-rank limits, MySQL/SQLite storage, PlaceholderAPI & Discord integration, and a fully editable English messages.yml.
BetterSlabPlacement
Allows placing full blocks on top of bottom slabs, greatly improves building flexibility. Requires Fabric API.
VertexCore
Lightweight core plugin for Paper servers providing config, database and command infrastructure for plugin developers.
Relocation
A simple building relocation plugin
Spell Utils Mod (1.21.1) – Library for Iron's Spells and Spellbooks Addons
Spell Utils Mod is a utility API designed to help developers create addons for Iron's Spells and Spellbooks Mod. It provides ready-to-use systems, classes, and tools that simplify the process of building custom spells, mobs, and bosses. This mod is mainly intended for mod developers, not regular players. Features: Mob & Boss Systems Custom spellcasting […]
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 […]
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; […]
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 […]
Decorative Core Mod (1.21.1, 1.20.1) – The Base for Cool Chests
Decorative Core Mod provides the essential code for other decorative storage mods to work correctly. It is a required library that supports mods in the Decorative series, like Decorative Storage. This mod runs in the background and does not add any of its own blocks or items to the game. Features: Acts as a required […]
Mapper Base Mod (1.21.1, 1.20.1) – Library for Mapper's Mods
Mapper Base Mod is a library mod that provides basic elements and functionalities to Mapper's mods. This mod adds a few contents, usually without any explicit usage so it is not a mod meant to be installed alone. Mapper Base Mod Download Links For Minecraft 1.21.1, 1.21 NeoForge version: Download from Server 1 – Download […]
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 […]
Dark Matter Mod (1.21.1, 1.20.1) – Provides a Base Framework Required By Other Modules
Dark Matter Mod offers a collection of miscellaneous tools and patches. It provides developers and potentially advanced users such as enum extension capabilities, content creation tools, and access to unsafe hacks. It is structured into several modules, each addressing specific areas like content registration, crash handling, on-screen particle effects, and recipe book enhancements. Features: Provides […]