You can make it - Open Source MMORPG Platform
Open Source MMORPG Framework
Complete Open Source and Modular solution for MMO
#1 Open Source Unity Networking Library
A companion for your LOTRO activities
An open source implementation of the Ultima Online Classic Client
A multiplatform medieval 3D MMORPG
Source of Mana is a unique 2D MMORPG
a wow model explorer
Gestionnaire WoW : bascule serveurs, sauvegarde, intuitif, FR/EN
An open-source Phantasy Star Online server for *nix
A suite of tools to make running a AzerothCore server on Linux easier
Auto Presser for Games
Arianne is an engine to develop multiplayer online games like Stendhal
A Religous AD&D Clone
Real time map point plotting from in game "/loc" to clipboard function
NCLA - анализатор логов Neverwinter Online.
WoW MultiLauncher - Élégant & Moderne | Vanilla, TBC, WotLK
GameServer is a sophisticated, game server designed for online games
LSJ-Server-Terra (Java Multipurpose Sever connected with MariaDB)