Built upon StackVM, Browserling lets you run as many virtual instances as you need right within your browser. That is, you will be able to launch several browsers directly within your browser, and see how the application that you are building behaves itself. And everything is tracked using a web console – there is nothing to install on your side.
These are the browsers which are currently supported: Internet Explorer 5.5, 6, 7, 8 and 9, Firefox 3.5, Chrome 7, Opera 10.6 and Safari 5.0.
Browserling is a free service, and it will remain like that. Eventually, some paid plans will be introduced, letting you carry out longer tests, and access the service more readily (right now, you sometimes have to wait for a session to be started).
Browserling.com In Their Own Words
Cross-browser testing from the comfort of your browser!
Why Browserling.com It Might Be A Killer
As far as virtualization platforms are concerned, this is quite powerful – just look at all the browsers that it can replicate.