Diplomacy_online is a project mainly written in JAVASCRIPT and PHP, it's free.
A web based version of the popular "Diplomacy" board game made by Hasboro
An implementation of the Diplomacy board game playable entirely in the browser
The big change that will be coming next is that I will be changing the way the map is drawn so that it will no longer have to rely on the raphaeljs libraries which I'm sure are playing a hand in making the interface very sluggish. I will instead be using the HTML 5 canvas tag.