Minecraft Java 1.21 Mods
Browse 759 free mods for Minecraft Java 1.21 — popular picks include FlatScript, TotemGuard, RTN's Economy Library.
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FlatScript
A simple, no-indent scripting language for Minecraft servers. Write commands, events, GUIs, NBT data, and more without complex syntax.
TotemGuard
TotemGuard is a lightweight client-side Fabric mod for Minecraft 1.21.4 that blocks non-totem items from being placed in your offhand slot, with optional sound and chat notification. Includes item highlighting and an in-game GUI.
RTN's Economy Library
Server-side economy library with rewards for killing mobs, kill combos, top lists and a developer API. Vault-style economy for mods in Minecraft.
Player Utils
This Is A NeoForge mod for Minecraft 1.21.1 that adds utility commands for server administration.
InfinityCore
Library used in InfinityGroup Plugins for compatibility and optimization development.
UniGUI
A universal GUI library, supporting both Vanilla and modded clients.
Frost Walker Tweaker
This DataPack lets you use Frost Walker II while riding an entity.
Dalib
A library mod that adds support for ItemGroup, Block, and Item registering. More to come.
SyAPI
Provides some obscure APIs for the development of other plugins
Pixel Combat
Pixel Combat is a professional, zero-dependency PvP combat plugin built for competitive Paper 1.21 servers.
Item Challenge
Give your server a collective goal: collect a set amount of any item before the in-game days run out. Track progress in real time through a boss bar, deposit your items in one command, and see who contributed the most.
Neuro Anticheat
Lightweight and practical anti-cheat plugin for Purpur/Paper 1.21.8.Designed for SMP servers that need a simple, configurable baseline protection without heavy setup.
Event Discord
Create Discord scheduled events directly from Minecraft with command
SpyHITW-Mod
A client side dependency mod, to render walls of hole in the wall and calculate physics.
Jobsy AutoDiscordLinker
JobsyDiscord is a lightweight Paper 1.21.x plugin that promotes your Discord server by sending automatic clickable chat broadcasts every 30 minutes. Players can click the message to instantly join your Discord, while Bedrock players (via Geyser/Floodgate)
Two-Dimensional Foil
A mod that adds a two-dimensional foil weapon from The Three-Body Problem. Drop it to collapse blocks and creatures into an irreversible, mirror-like 2D plane within a configurable radius. Requires Fabric API.
![Easy Trading Russificator [РУС]](https://pub-2ae937f770284535a96c3330f91236aa.r2.dev/thumb/modrinth/154642.webp)
Easy Trading Russificator [РУС]
Official Russian language pack for Easy Trading Plugin. Allows you to change the plugin's system language to Russian.
API-GeneratorColor
A tool designed to generate and convert color values in HEX format.
CustomItemBars Lib
This mod allows you to add additional colored bars to any item
DialogAuthVelocity
Velocity addon for DialogAuth for premium accounts support
MapCycle
MapCycle makes managing rotating FFA maps simple by handling everything automatically while keeping full control available for administrators.
More items for furnace
Would you like more items to smelt in your furnace so you can smelt more items?
Staminafy
Adds a simple stamina system to Minecraft.
Tom's Loot (Dp Edition)
This datapack adds a variety of loot tables and can be used by other mod developers for structure mods and other mods with loot tables as a basis. Datapack Edition
Aftermath 4
This a datapack that adds new features to your game, like crafts and some structures!
Relocation
A simple building relocation plugin
Craftels API
This mod is an API for Project zomboid like "Craftels" (Moodles)
PluginListPlus
A more readable plugin list with customizable aesthetic themes and styles.
Flame Announcer
A powerful and highly customizable announcement plugin featuring scheduled Chat, BossBar, and Interactive clickable messages with full in-game management.
Custom Collision Box
A datapack library that can create custom collision/interaction box with management.
KotlinScriptLoader
It’s a script-based project—you can write your own scripts using full-fledged Kotlin! You can even create your own API and build add-ons! It’s got absolutely everything!
CobbleFight
A dedicated ELO Battle system for Cobblemon
Aura Nexuses
Grant abilites based on large-scale constructions. Grant permissions dynamically.
Various Sable Weights
Just added Weights for Sable by tags and then mod specifics. made it for myself and just throught I'd share.
CracoBan
A lightweight Paper plugin that permanently bans selected Minecraft items from player inventories.
Kit Manager
A Datapack that lets you save your inventory into a kit to then load it later down the line!