Complete Open Source and Modular solution for MMO

Biomes is an open source sandbox MMORPG built for the web using web technologies such as Next.js, Typescript, React and WebAssembly.

Reldens - You can make it - Open Source MMORPG Platform

An infinity procedural online game using Flutter with NodeJS and flames

Distributed Java game server, including login, gateway, game demo

Albion online stats is an extension to MMORPG game - Albion Online. It tracks network traffic and displays various statistics, such as damage and DPS meter calculated from in-game actions.

A server emulator for Lineage2 Interlude written in C#

A modern Ultima Online server written in PHP

A free, open source 2D online RPG engine in C#/.NET

WTF?! Adventure is a massively online 2D MMORPG with WTF?! twists.

Scalable MMO servers instantiation, dungeon instantiation and player balancing subsystem for unreal engine

Python-based MMO game framework using sockets and PyGame.

Open Source Php/NodeJs Online RPG and Trading Game Engine

World of Warcraft 2.4.3 Server Emulator

Client for Argentum Online

Nephtys Open Source MMORPG Written in C++17

Legacy VB6 ORPG engine

Legacy VB6 open-source ORPG

A 2D MMO Engine

Golang Distributed MMO Game Server