Minecraft Java 1.21 Mods
Browse 759 free mods for Minecraft Java 1.21 — popular picks include Infiniframes lib, Sweet Greens, Even More Advancements (EMA).
Updated daily
Infiniframes lib
(datapack template) - Adds method of converting item models to custom placeable, rotatable blocks using item frames
Sweet Greens
A farming & consumable mod focused on flavorful buds & crops
Even More Advancements (EMA)
This datapack aims to add many new advancements, challenges and goals to Minecraft. This will be updated frequently, adding more advancements or fixing bugs. Installation: Put the downloaded ZIP into: %appdata%\.minecraft\saves\[yourworld]\datapacks.
[ Craftable Wheat Seeds 1.3.1] Craft The_Uncraftable
This Minecraft Java Edition Data Pack adds recipes to uncraftable items.
twinkle popo mod
it adds twinkle popo realistic pikachu and realistic hellokity
PaperZ
Plug-in for notes!
Earwax
EarWaxers is a silly Fabric mod where pressing P on a stick or blaze rod “cleans” your ear and leaves edible earwax on the tip (hurting you in the process, and lighting you on fire if it’s a blaze rod). Cook that wax through burnt, crispy, very crispy, a
SimpleCore by Cooshh
A shared core library for Simple mods, providing common systems like economy support and shared utilities.
FurnaceEditor
A collection of powerful in-game editors to manage crafting and smelting recipes effortlessly. Create, edit, and delete recipes via intuitive UIs without ever touching a config file.
OpenRouter Chatbot
OpenRouter Chatbot is a powerful and highly configurable Spigot plugin that integrates the OpenRouter AI API into your Minecraft server.
Camera Works
A badly made library of cameras for datapacks :/
Sul4urLib
A library data pack/mod.

Create: World of Colors
Putting some more color into your Factory Lines
Pivot Poly
PivotPoly is a powerful Minecraft plugin designed for creators, builders, and server owners who want to bring their builds to life with high-fidelity, smooth-animated mechanical structures.
Ultimate Step
UltimateStep is an all-in-one Paper server management plugin featuring a powerful rank system, configurable scoreboard, customizable tablist, and complete punishment tools including warn, mute, ban, kick, unmute, and unban. Lightweight, modern, and easy
Artificial Enchantments API
centralized singleton enchantment managment api (folia comaptible)
Ponder Datapack
Emulate some Ponder mod features in datapack
Acumulated Forms
Adding bedrock form functionality into java using the Cumulus library.
PlayCustomSounds
This project allowed owners to add new disc to their server
HMWBTE's Cosmetics
A datapack that brings custom text displays (and more) into survival!
QAL
QAL is a Lib and Tag mod for other Quim Related mods
Albumize
your screenshots, finally in their right place, easily accessible from the in-game gallery/library
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.
Mana Lib
Adds a highly customizable mana bar to Minecraft, appearing above your hunger bar, which can be easily managed by NBT data.
Minethon API
API for commands, Datapacks and more!
LiveJava
a VS Code-powered Web IDE that lets you build multi-class, hot-swappable native Java plugins instantly with zero reloads and automatic dependency injection.
VoxCore (ChatCore)
A modern and fully customizable chat system for Minecraft, built to manage every aspect of player communication.
PlugLoader
It is a plugin framework that enables the creation of dynamic and modular systems on Minecraft servers. It simplifies the process of adding new features to the server and allows for the quick management, activation, and deactivation of systems. (BETA)
Liquid Lab
A fluid API to streamline the creation of custom fluids and gasses.
Player Mutations
A behavioral evolution system that mutates players based on their playstyle. Every cycle (default 3 days), the plugin analyzes player behavior and triggers mutations that fundamentally change how they play.
Claude Code: Rate Limited
A Fabric mod for Minecraft 1.21.1 that adds Claude Code enchantments, token limits, rate limiting, item recovery, loot-based enchanted books, achievements, and the Claude Terminal.
Dreamcraft Networks Custom Music
This makes it possible for users to upload music to my website and then get the music in the game as music discs.
Web's Node Library
A lightweight node-based GUI library for NeoForge 1.21.1. Features visual data flow and infinite canvas.
PannHarvestEngine
PannHarvestEngine is a high-performance, modular resource gathering framework for Minecraft. It replaces vanilla mining and interaction mechanics with a versatile HP-based harvesting system suitable for ores, timber, and custom agriculture.
Tooltip+
The Ultimate Tooltip Mod
flok
Flok is a fast, lightweight scripting plugin for Paper/Spigot servers. You write plain .fk files; no Java, no compile step, no restarts for most changes. Drop a script in, run /flok reload, and it's live.