As a software developer or tester we are always concerned about how our web application will look across different browser. Does any functionality gets hampered across browser. Well we have two different websites which will settle our curiosity.
1. Spoon – http://www.spoon.net/browsers/
Spoon allows you to run your application using different browsers. All you need to do is register (Its Free) and install the plugin, and from there you could choose from different versions of Mozilla Firefox (2 to 11) Google Chrome (11 to 18), Safari (3 to 4), Opera (9 to 11), Firefox Mobile ( 2 and 5), Opera Mobile (6.5 and 11.5), and many more. The only draw back is it has some limited usage. But you can upgrade at nominal price when ever you wish.
2. Browsershots – http://browsershots.org/
Browsershots captures images of your website across different browsers (ample of options even which you might not be aware of) on different Operating system (Linux, Windows, Mac and BSD) which user selects initially. Its an best application to identify GUI issues across different OS in different Browsers for your website. The draw back here is it takes time to fetch data approximately 10 mins to 3 hours, depending on your request (Number of Browsers and Operating System).
**This websites have other features too which are worth trying.
Hope this blog helps you. If you have any suggestion, please do write a comment.