CoolPreviews is described as 'Browse faster—Preview links and images without leaving your current page or tab. Just mouseover any link and a preview window appears to display the content' and is an app in the web browsers category. There are three alternatives to CoolPreviews for a variety of platforms, including Windows, Linux, Chrome OS, Google Chrome and Mozilla Firefox apps. The best CoolPreviews alternative is Hover Zoom, which is free. Other great apps like CoolPreviews are Page Portal and Simple Link Preview.
Browse images galleries with ease: move the mouse cursor over thumbnails to view images in their full size without loading a new page. Pictures are automatically resized if they don't fit the window.
Open any link in a panel, this makes the page more temporary than a tab. Open a link in a portal do something fast, get some information, then trash it and go back to business.
France
EU
Norway
Does about the same as Cool Previews, others are chrome extensions