Mozilla Prism is an easy and perhaps the easiest way to convert a web application into a desktop appliation. If you are a regular user, you will have a few web appliations open on your browser all the time. I, for instance, I have our custom project management tool, Google Calendar, Google Reader and my email open in tabs pretty much all the time.
Mozilla Prism lets you convert a website into a standalone application easily. By easily, I mean in a single click! See the following video and you will see.
Click here to start using the Prism.