Welcome to the home of Zap Engine, a free, GNU licensed, game engine written in PHP and sponsored by http://www.nowhere-else.org, http://www.playerscorner.org and http://www.makewebgames.com.
What is the ZAP Engine:
The Zap Engine is a collaboration between different members of the MWG Forums. The engine will be at the end a bit more than a simple empty engine as it is meant to be a full working default game. Admin tools should allow to edit most if not all part of the games content like "location contents" (for example jobs), battle monsters, etc...
The game will take a full modular design, and will allow new developers to just develop modules without the requirement to change the core files or at least limit those.
zapengine works great