Discord MMO Engine
Discord is highly expressive, text-based MMO engine written in JavaScript on top of Node.JS and MooTools.
This is packaged as a library. Just add discord to your package.json file, then type npm install.
Usage
Here's an example world using the Discord engine:
require('discord').start({
world_name: 'DiscordMUD',
world_path: __dirname+'/world',
start_room: 'lobby'
}).listen(8000);
For more information, check out http://github.com/Yuffster/discord-example.