ones we develop any application or any website then basically we are testing that site on different browser or different platform but its very time consuming and time taking , at first we have to install that browser and then we have to test that, but if you want to test your web application or website in different browsers,and different platforms in easiest way then Browser shots will help you.It makes screen shots of your web design in different browsers. It is a free open-source online service.
its very simple you need to submit your web address, it will be added to the job queue. A number of distributed computers will open your website in their browser. Then they will make screen shots and upload them to the central server of Browsershots. It supports Windows ( Firefox 1.5, Internet Explorer 5.0 and 6.0 ), Mac (Firefox 2.0, Safari 2.0 ), Linux ( Iceweasel 2.0, Konqueror 3.5 ). and more
you can also test your application here http://browsershots.org/
its a open source applciation , you can download that images ones you test your application ,and then make a changes according to same,
hope you like this .