Mods for Minecraft Java
Browse 51 free mods for Minecraft Java — popular picks include CB Multipart, Forge Multi Part, Cosmos Library.
Step by step: How to install Minecraft Java mods & modpacks
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CB Multipart
An opensource library for having multiple things in the one block space
Forge Multi Part
an opensource library for having multiple things in the one block space.
Cosmos Library
Main required library for all TheCosmicNebula_ mods.
CosmicLib
Shared library for CosmicDan's Minecraft mods
Advanced Rocketry Tweaker (AR Tweaker)
Adds CraftTweaker support to Advanced Rocketry
Dual Hotbar
Double your hotbar space
Advanced Tweakery
CraftTweaker support for new Advanced Rocketry
Advanced Rocketry Tweaker (ARTweaker) Updated
An addon for Advanced Rocketry that allows recipe modification via CraftTweaker scripts
MatterLink
Simple bridge between Minecraft, Mattermost, IRC, XMPP, Gitter, Slack, Discord, Telegram, Rocket.Chat, Hipchat(via xmpp), Matrix and Steam.
Bundle Weight, There's More!
Adds an item component for controlling the weight of an item in a bundle (how much space it takes up)
Astromine: Core (No Longer Used)
The API module of a space-themed technological modification with exploration, weapons and progression in mind, adding our APIs and libraries.
Exposure: Space
Astrophotography expansion for Exposure. Discover 200 real celestial objects and build your own space catalog.
HammerMultipart
Library to place multiple things in one block space.
Neroland Core
The shared foundation library for the Neroland sci-fi mod ecosystem — required by Nerospace and every other Nero mod.
RocketPlaceholders
Create custom placeholders for PlaceholderAPI with a lot of custom conditions.
DynamicDimension AR Edition
Library mod allows dynamic level creation, finetuned for advanced rocketry
AudioLayer
Load your own MP3 files from a local folder and play them in-game under the `audiolayer` namespace. It also includes built-in KubeJS support for client-side scripting, plus ready-to-use examples for modpack and gameplay integration.
Color Legacy Wood Planks
A Library mod for an upcoming Liminal Spaces dimension mod, this is a required dependancy but can be used by itself.
CelestialLib
A library mod for space exploration mods, like Celestial Exploration
Client Base
Bringing your pause menu to physical space!

Planet - Border teleport
Border-teleport mod: teleports entities crossing world borders (±326) to opposite side. Perfect for 1:326 Earth maps. Open-source (remix allowed, but must keep code open).
TagLib
Library for Tags via NamespacedKeys
KubeX
Development toolkit for KubeJS with dedicated workspaces, Rhino compatibility and source-level debugging.
LibVulpes-TFRU
A forked ver of Libvulpes for TFRU, contains necessary modificaions for AdvancedRocketry-TFRU to functions properly
Shader ID Dual-Patcher
Patches the shader IDs with custom namespaces that are already modified twice.
Space Moderation System
Take full control over your server's moderation with a single, feature-packed plugin. SpaceModeratorSystem provides a complete admin toolkit — reports, punishments, cheat-checks, spectating, staff chat, a gorgeous themed admin panel, and more.
Vivid Trinket Core Mod (26.2, 1.20.1) – Wear Rings and Charms in Extra
Vivid Trinket Core Mod adds a lightweight accessory framework to your game. It gives you extra inventory space specifically meant for wearable trinkets like rings, charms, and special equipment. The mod lets other mods add their own wearable items without cluttering your main inventory slots. You can also customize your screen layout to place extra […]
SnAssets Library – General Mod (26.2, 1.20.1) – Add Crisp Action Audio
SnAssets Library – General Mod brings a collection of shared sound effects, textures, and particle sprites into Minecraft. This mod operates under a single namespace so other projects can call high-quality effects without bundling duplicate files. It supplies over one thousand audio clips ranging from firearms and rockets to rain and car doors. The library […]
Boundless Aspect Mantle Mod (1.20.1) – Wield Godly Powers Across Seven Cosmic
Boundless Aspect Mantle Mod introduces seven cosmic seats that grant godly powers, individual dimensions, and essential world duties. Only one player can hold each seat at a time, taking on the mantle of Destiny, Death, Dream, Destruction, Desire, Despair, or Delirium. Each seat requires ongoing care to maintain, as ignoring your duties causes negative world […]
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, […]
CB Multipart Mod (1.21.1, 1.20.1) – Combine Parts in One Block
CB Multipart Mod (formely known as Forge Multipart) is an opensource library for having multiple things in one block space. Features: Allows multiple modded parts, like cables or panels, to fit inside one block. Acts as a core library that other mods depend on to add multipart blocks. Lets you combine different small items from […]
Gaming Deco Mod (1.20.1, 1.19.2) – Decorate a Gaming Setup Room
Gaming Deco Mod adds computers, monitors and many wide blocks related to gaming: Monitors, PCs, PlayTics Stations and much more… Features: Adds items like computers, monitors, keyboards, and gaming consoles (e.g., PlayTics Stations) to decorate your spaces. Includes RGB-themed blocks and accessories for that ultimate gamer vibe. Screenshots: Requires: Minecraft Forge or Fabric API Gaming […]
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 […]
ARLib Mod (1.21.1, 1.12.2) – Library For Advanced Rocketry Reworked Mod
ARLib Mod is a core library mod designed to support and streamline the functionality of mods in the Advanced Rocketry Reworked ecosystem. It provides essential tools and shared resources that enable integration and performance optimization for dependent mods. Features: Core Functionality: Supplies foundational code and systems required for Advanced Rocketry Reworked and its related mods. […]
LibVulpes (1.16.5, 1.12.2) – Library for zmaster587's Mods
LibVulpes is a small library containing functions and classes common to zmaster587's mods. Currently required to run the following mod: Advanced Rocketry. LibVulpes Download Links For Minecraft 1.7.10 Download from Server 1 For Minecraft 1.10.2 Download from Server 1 For Minecraft 1.11.2 Download from Server 1 For Minecraft 1.16.5 Download from Server 1 For Minecraft […]
Advanced Rocketry Tweaker Mod (1.12.2) – Compatibility, Addon
Advanced Rocketry Tweaker Mod is a way of working with Advanced Rocketry recipes with Craft Tweaker. Sample script: // Chemical Reactor //mods.advancedrocketry.ChemicalReactor.clear(); mods.advancedrocketry.ChemicalReactor.removeRecipe(<liquid:rocketfuel>); mods.advancedrocketry.ChemicalReactor.addRecipe(<liquid:rocketfuel>*1000, 80, 100, <liquid:oxygen>*500, <liquid:hydrogen>*500); //mods.advancedrocketry.ChemicalReactor.addRecipe(<minecraft:obsidian>*1, 80, 100, <liquid:lava>*1000, <liquid:wat