prism

Mozilla labs have developed software which they call Prism. It will bring web from the browser to desktop environment level. It will allow you to open email services like Gmail like an application on your desktop. Prism is built on the platform of Firefox so it will support all the rich internet technologies like HTML, JavaScript, CSS, etc and runs on Windows, Mac OS X, and Linux.

Currently it’s in beta phase and people are invited to download the source code and try their coding skills on it. For those who just want to try the app. may download it from here.