Open Source BSD Minecraft Servers

BungeeCord is a Minecraft server proxy designed to connect multiple Minecraft servers into one larger network. It lets players move between separate servers while experiencing them as part of the same connected environment. The project is maintained by SpigotMC and has long been used by server owners who operate lobby, minigame, survival, creative, and specialized game-mode networks. BungeeCord works as a layer between players and backend servers, forwarding connections and managing server-to-server transitions. It also provides an API that developers can use to create plugins and extend proxy behavior. Its main value is helping Minecraft communities scale beyond a single server while keeping navigation smoother for players.

SteelMC is an independent Minecraft Java Edition server implementation written in Rust. It aims to reproduce vanilla behavior while using modern multicore processors more efficiently. Gameplay updates remain synchronous, while chunk generation, lighting, packet processing, and chunk transmission can run outside the main server tick. Players can join persistent multiplayer worlds, move, interact with blocks, manage inventories, use commands, chat, and return to previously saved areas. Its networking layer supports Java Edition authentication, encryption, compression, and protocol communication. World generation is currently its most complete system and is tested against reproducible vanilla chunks for block-level parity. SteelMC remains in pre-alpha, with incomplete survival mechanics, limited entity behavior, no plugin system, and no compatibility with Bukkit, Paper, Fabric, Forge, or NeoForge extensions.

This project gives you freedom to get a fully-customized plugin for CraftBukkit Minecraft servers. You choose what to include and build it up. No more command collisions, no unnecessary memory and processor overhead on your server.

An alternative/custom Minecraft server, written in Java, compatible with the original protocol. OpenCraft is built upon Apache MINA, SLF4J, Jython and XStream. The aim is to have features not in the official server distribution, like antigrief/scripting.

You will need Python2.6 (http://www.python.org/ftp/python/2.6), PyQt (http://www.riverbankcomputing.co.uk/software/pyqt/download). Use x86 version of PyQt even you have x64 OS. If you use windows compiled version and have any problems with MSVCR90.dll you should install Microsoft Visual C++ 2008 Redistributable Package (http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=29).

A Minecraft server written in C# with a large focus on concurrency (multi-threaded) and plugin support. Custom code provides new functionality to existing Minecraft features - this includes new biomes, realms, and populators. Has a robust and customizable terrain generator and easy plugin capabilities for new features.

A C++ based custom Minecraft server with Perl Scripting

This is a little tool than I'm doing to learn Java. Right now it's available in Spanish and English. Note: A 1.3.1 compatible version coming soon.

Mit diesem kompakten Script ist es möglich einen Vanilla, einen Bukkit Stable und einen Bukkit Beta Server zu erstellen. Darüber hinaus ermöglicht es dem Nutzer alle benötigten Pakete für einen Minecraft Server zu installieren.

Rust framework for building Minecraft: Java Edition servers. Built on top of Bevy ECS, Valence is an effort to create a Minecraft-compatible server completely from scratch in Rust. You can think of Valence as a game engine for Minecraft servers. It doesn't do much by default, but by writing game logic yourself and leveraging Bevy's powerful plugin system, you can make almost anything. Opinionated features like dynamic scripting, dedicated executables, and vanilla game mechanics are all expected to be built as optional plugins. This level of modularity is desirable for those looking to build highly custom experiences in Minecraft such as minigame servers.