Duo 1.2

Duo is a dual-paned web browser built for Responsive Web Design.

Duo is a dual-paned web browser built for Responsive Web Design (RWD) that lets you browse the web in two views: your standard ‘desktop’ view as well as a typical ‘mobile’ view.

By seeing these two views at the same time, you’re able to quickly test and work through multiple screen experiences rather than considering them separately.