Arianne is an engine to develop multiplayer online games like Stendhal
online 4X browser game engine
Online Zombie Game is a medieval-zombie apocalypse rpg game.
Alpha One is based on Vallheru
Game engine allows you to create own MMORPG
Modular Gaming Open Source Persistent Browser Based Game Framework
Mafia MMORPG Browser-Based game
Create your own online real-time browser-based MMO in your website
Earthlead is a free massive multiplayer online browser strategy game.
Tactics is an Online Role Playing Game developed by the Gametack team
Atlarius is no longer under development.