Open-source PHP/XUL application client-server framework - SiteFusion

Open-source PHP/XUL application client-server framework – SiteFusion

SiteFusion is a server-based development environment. Applications are written in pure object-oriented PHP and work through a thin XUL client. SiteFusion applications look and behave like native system applications but run on a server generating JavaScript commands.

There are no extra configurations required than running a website as the XUL client connects to a regular web server.
In a running application, the server generates JavaScript commands that result in a GUI built from rich, operating-system native UI elements and fine-grained control over application behavior and reaction to user actions. The communication from the client to the server consists of events packed in JSON format.