I stumbled upon it today looking for something else. It's pretty cool. It gives you a fully functional mobile browser right on your desktop. No need to mess about with plugin emulators and the like. So if you're developing a site for mobiles or you just want to see how your site performs in the mobile browser environment this is one nifty bit of kit! You can get it here: http://labs.opera.com/news/2010/04/22/ Lots of things you can do with it as well, from operating at different screen sizes to different browser agents. http://dev.opera.com/articles/view/opera-mobile-10-widgets-mobile-emulator-desktop/