Open source clone of the Age of Empires II engine
A lightweight game server framework implemented with Actor Model
Mangos ZERO is a server for World of Warcraft
Odamex is a free, cross-platform, modern client-server Doom engine
Tools for Super Tux Kart server operators
A fast, scalable, distributed game server engine/framework for C++
IGS Labs
Provides a full suite of clients and servers for virtual worlds.
RelaxChess, chess game that makes no search futher needed for a wow
starrydb is game server engine
A project which is based off of NNN Online.
A turn-based multiplayer shooting game in the style of Worms
Multiplayer mod for the Jedi Knight game series.
MvMTrainer plugin provides 'training' mode for MvM matches of TF2
Develop an emulated Darkfall Online Server.
Legends of Equestria Private Server, Wapa Castle Team Edition
Open Source HGWC's Encryption
Top-down multi-player zombie survival game
Proxy for games that emulates network conditions like ping and lag.
The map viewer application for Greencubes minecraft server
Command Line Utility for management of Minecraft Servers