Open Source Java Game Mods
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Java Game Mods
View related business solutionsBrowse free open source Java Game Mods and projects below. Use the toggles on the left to filter open source Java Game Mods by OS, license, language, programming language, and project status.
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PojavLauncher
A Minecraft Java Edition Launcher for Android and iOS
A Minecraft Java Edition Launcher for Android and iOS based on Boardwalk. This repository contains source code for the Android platform. -
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MCA Selector
A tool to select chunks from Minecraft worlds for deletion or export
An external tool to export or delete selected chunks and regions from a world save of Minecraft Java Edition. -
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Universal Pokemon Randomizer ZX
Public repository of source code for the Universal Pokemon Randomizer
Universal Pokemon Randomizer ZX is an open-source tool that allows players to modify and randomize various aspects of Pokémon games across multiple generations, creating unique and unpredictable gameplay experiences. It supports a wide range of ROMs and provides a user-friendly interface for customizing game elements such as Pokémon encounters, abilities, stats, movesets, and item distributions. The tool is designed to maintain game stability while introducing variability, ensuring that randomized versions remain playable and balanced. It also includes advanced options that allow users to control the level of randomness, from subtle changes to complete overhauls of game mechanics. By enabling customization, the project extends the replay value of classic Pokémon titles and encourages experimentation with different strategies. It is widely used by the community for challenge runs, content creation, and personalized gameplay experiences. -
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Sodium
A Minecraft mod designed to improve frame rates
Sodium is a powerful rendering engine and optimization mod for the Minecraft client which improves frame rates and reduces micro-stutter while fixing many graphical issues in Minecraft. A Minecraft mod designed to improve frame rates and reduce micro-stutter. -
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VulkanMod
Vulkan renderer mod for Minecraft
This is a fabric mod that introduces a brand new Vulkan-based voxel rendering engine to Minecraft Java in order to both replace the default OpenGL renderer and bring performance improvements. -
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Roblox anti-AFK
Never get AFK kicked from Roblox again!
Never get AFK-kicked again! With Roblox anti-AFK you can easily: grind, farm, chill and whatever you want! It's very easy to use. Just press "Start!", and good luck being AFK! You don't even need to have the Roblox window open. Roblox anti-AFK allows you to AFK in Roblox while you can still use your device. I hope you'll make lots of progress in your favourite simulators! Feel free to add suggestions! =====Version: 2.9.1===== Requires Java to be installed to run. You can download it here if you don't have it already: https://www.java.com/download/manual.jsp If you have trouble opening the program, the first post may help: https://sourceforge.net/p/roblox-anti-afk/tickets/7/?limit=25 -
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Hello Minecraft! Launcher
A Minecraft Launcher which is multi-functional, cross-platform
HMCL is a cross-platform Minecraft launcher that supports Mod Management, Game Customizing, ModLoader Installing (Forge, NeoForge, Fabric, Quilt, LiteLoader, and OptiFine), Modpack Creating, UI Customization, and more. HMCL has amazing cross-platform capabilities. It can not only run on different operating systems such as Windows, Linux, and macOS, but also supports multiple CPU architectures such as x86, ARM, MIPS, and LoongArch. You can easily play Minecraft on different platforms through HMCL. -
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MCreator
Make Minecraft Java Edition mods, Minecraft Bedrock Edition Add-Ons
MCreator is an open-source integrated development environment designed to simplify the process of creating Minecraft mods, add-ons, resource packs, and data packs. The software provides a visual programming environment where users can design mod features using graphical tools instead of writing code manually. Through wizards, block-based programming interfaces, and an integrated editor, MCreator generates the underlying Java or JSON code required for the mod automatically. This approach allows beginners and students to experiment with mod development without needing extensive programming experience. At the same time, advanced users can extend the tool through plugins or directly modify the generated code for more complex projects. MCreator is widely used in educational settings, modding communities, and programming workshops as a gateway into game development. -
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CatServer
A high performance and high compatibility 1.12.2/1.16.5/1.18.2 version
CatServer is an open-source hybrid Minecraft server implementation that combines support for both Forge mods and Bukkit-style plugins within the same server environment. Traditional Minecraft server software typically supports either mod loaders such as Forge or plugin systems like Bukkit and Spigot, but CatServer aims to bridge this gap by enabling both ecosystems to coexist. This hybrid approach allows administrators to run modded gameplay features while also using administrative plugins designed for plugin-based servers. The project modifies the server architecture to integrate Forge modding capabilities alongside plugin compatibility layers. As a result, server operators can build more complex environments that include both gameplay modifications and server management tools. CatServer is particularly useful for communities that want the flexibility of modded Minecraft while retaining access to established plugin-based server administration tools. -
Error to trace to log to deploy. One click. No SSH.AppSignal links every error to the trace, the trace to the log, the log to the deploy that shipped it.
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Arclight
A Bukkit(1.19/1.20) server implementation in modding environment
A Bukkit server implementation on common mod loaders. -
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NeoForge
Neo Modding API for Minecraft: Java Edition, based on Forge
NeoForge is an open-source modding API and mod loader designed for Minecraft: Java Edition that enables developers to create and run game modifications within a structured development framework. The project was created as a community-driven continuation of the Minecraft Forge ecosystem and aims to provide a modernized, actively maintained platform for mod development. NeoForge includes tools, APIs, and build systems that allow developers to modify game behavior, add new gameplay mechanics, and integrate custom content into Minecraft worlds. The framework is designed to simplify the development process by offering standardized interfaces, development kits, and compatibility layers that help mod creators build complex modifications without rewriting core game code. By supporting mod development tools such as Gradle plugins and mod development kits, NeoForge allows programmers to efficiently build, compile, and distribute mods for multiple versions of Minecraft. -
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MCinaBox
A Minecraft: Java Edition Launcher for Android
A Minecraft Java Edition Launcher on Android. MCinaBox is an open source project with the goal of building and developing a Minecraft Java Edition launcher that runs on an Android. Front End provides User Management, Minecraft Version Management, Minecraft Game Controller, Minecraft Startup Parameter Generation, Configuration Backend, Configuration and Management functions to reduce the workload of complete launcher development. -
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MotorAssistance
Aim assistance for blocks and mobs
AimAssistanceMod is a Minecraft modification that provides aim assistance for interacting with blocks and mobs. It is particularly beneficial for players using controllers or those with disabilities, as it enhances the gameplay experience without offering any advantage in player-versus-player (PvP) scenarios. The mod is fully configurable, allowing users to tailor the assistance to their preferences. -
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Mohist 1.20.1
Minecraft Forge Hybrid server implementing the Spigot
Tenet is an open-source experimental project related to Minecraft server or modding infrastructure that explores alternative approaches to building scalable and modular gameplay systems. The project aims to provide developers with a framework for experimenting with advanced server architecture and performance-oriented design. By focusing on modular components and extensible design patterns, Tenet allows developers to create systems that can integrate with other Minecraft tools and frameworks. The architecture encourages experimentation with new networking, gameplay logic, or server extension mechanisms. Projects like Tenet often serve as research platforms where developers test new ideas about game server design, concurrency, and plugin systems. The codebase provides a foundation for building new tools or prototypes related to Minecraft infrastructure. -
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GeyserMC
A bridge/proxy allowing you to connect to Minecraft
Geyser is an open-source proxy and protocol translation tool that enables cross-platform multiplayer between Minecraft: Java Edition servers and Minecraft: Bedrock Edition clients. The project works by translating network packets between the two different game protocols so that players using Bedrock Edition devices such as consoles, mobile phones, or Windows editions can connect to servers originally designed for Java Edition. By bridging the differences between the two platforms, Geyser allows server communities to unify players who would otherwise be separated by incompatible game editions. The software typically runs as a plugin, proxy, or standalone bridge and integrates with popular Java server platforms such as Spigot, Paper, or Velocity. -
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WorldEdit
Minecraft map editor and mod
WorldEdit is a powerful open-source Minecraft map editing toolkit that allows players, builders, and server administrators to quickly modify large areas of a Minecraft world directly from within the game. Instead of placing or removing blocks individually, WorldEdit provides commands and tools that enable users to select regions of the world and apply transformations to thousands or even millions of blocks at once. This capability makes it extremely useful for constructing large builds, terraforming terrain, repairing damage, or managing multiplayer server worlds efficiently. The tool includes a variety of editing methods such as brushes, shape generation commands, and clipboard operations that allow copying, pasting, and rotating entire structures. WorldEdit can run in both single-player environments and multiplayer servers and is compatible with several modding platforms and server frameworks used in Minecraft Java Edition. -
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BedrockConnect
Join any Minecraft Bedrock Edition server IP on Xbox One
On Minecraft Bedrock Edition, players on Xbox One, Nintendo Switch, and PS4/PS5 are limited to playing on 'Featured Servers' approved by Mojang/Microsoft. These players are not able to join servers via an IP/address. This is an issue for me and others, as the server community on Java edition was one of the major parts that made Minecraft what it was, and what also made the servers that are now considered 'Mojang Server Partners' what they are today. I wanted to fix this, so I made a solution that anyone can set up easily. -
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Minecraft X-Ray is a program whose primary purpose is to aid in finding valuable ores and resources inside a Minecraft world. This branch is based on code written by plusminus from the Minecraft forums.
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Create
Building Tools and Aesthetic Technology
Create is a large Minecraft modification that introduces mechanical engineering systems, automation tools, and kinetic machinery into the game. The mod focuses on building complex contraptions powered by rotational energy rather than relying on traditional redstone circuitry alone. Players can design elaborate machines using components such as shafts, gears, belts, and mechanical devices that interact with each other to automate crafting, farming, and resource processing. Unlike many technology mods that rely heavily on graphical interfaces, Create emphasizes visible mechanical movement and physical machinery that operates directly in the game world. The mod also includes a visual documentation system called “Ponder” that demonstrates how each machine or component works through animated tutorials inside the game. -
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Lithium (for Fabric)
A Fabric mod designed to improve the general performance of Minecraft
A general-purpose optimization mod for Minecraft, improving server and client performance. -
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ViaVersion
Allows the connection of newer clients to older server versions
Allows the connection of higher client versions to lower server versions - it works on any platform you can think of. The base ViaVersion jar runs on Paper and Velocity. We also have projects integrating ViaVersion to run on Fabric, Forge, Bungee, Sponge, or as a standalone proxy to join from basically any client version on any server version from the past decade. See HERE for an overview of the different Via* projects. Note that ViaVersion will be able to run best on either Paper servers or through ViaFabricPlus due to having direct access to client/server state and more extensive API. -
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Slimefun 4
A unique Spigot/Paper plugin that looks and feels like a modpack
A Minecraft plugin adds hundreds of new features, such as advanced machines and magic, to enhance vanilla gameplay. -
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FarPlaneTwo
Level-of-Detail renderer in Minecraft. Allows for render distances
FarPlaneTwo is an experimental open-source Minecraft mod that introduces a Level-of-Detail (LoD) terrain rendering system designed to dramatically extend how far players can visually see across the game world. Instead of rendering distant terrain using the same detailed chunk system as nearby areas, the mod generates simplified representations of terrain that require far fewer resources to display. This approach allows players to view landscapes at extremely large distances while maintaining acceptable performance levels. The project aims to support render distances far beyond the limits of the standard Minecraft engine, potentially reaching hundreds of thousands or even millions of blocks. By creating progressively lower-detail versions of terrain farther from the player, the mod can display the shape and structure of distant regions without fully loading those chunks. -
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NostalgiaLauncher
Minecraft PE Alpha versions launcher for Windows and Linux
Minecraft PE Alpha versions launcher for Windows and Linux
