LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
Superproject containing build scripts and tools to download assets
The multiplayer game engine
State Management and Multiplayer Networking for Turn-Based Games
HTML5+WebSocket+PHP(Workerman) , rumpetroll server writen using php
A Minecraft like game written in go
Open source reimplementation of GTA San Andreas game engine in Unity
Crossfire RPG Game Weather Patch -- Now a branch on the official repo!
The online networked game called Imperium
A Minecraft server implementation in Rust
A retro multiplayer shooter
A fast, scalable, distributed game server engine/framework for C++
A lightweight, fast and extensible game server for Minecraft
A WebSocket library optimized for multiplayer JS games
Planimeter Game Engine 2D - LÖVE-based game engine for Lua
Free MMORPG
Compatible client of Ace of Spades 0.75
Based on the raedwulf-et project
Multiplayer game server based on Node.JS
Cosmos Tycoon is a open source transport simulation browser game.
An online multiplayer tactical warfare game for fast action combat!
JAVA websocket implementation for a bomberman-like game