Lunascape let youchange the render engine and view the same website as if you were viewing it on different web browsers. You can find Trident (IE), Gecko (Firefox) and differe variations of WebKit (Safari, Chrome) and more. The change can be done manually or planned in case of certain URLs.
Lunascape also offers other functionalities present in the rest of browsers: tab browsing, mouse gestures, RSS tools, skins, auto-fill, search box, bookmarks and add-on support.
By this way, Lunascape becomes very useful, specially if you are a web designer and you want to check how your website is offered to the users of different web browsers.