We live in a happy and painful time, there are too many browsers to use, for Web development and designers, you have the obligation to ensure that your design compatible with all major browsers. However, cross-browser testing is quite complex, involving different browsers, different versions, and different platforms. This article describes a large number of resources related to cross-browser compatibility testing.
Online test Resources
Browsershots
is a popular free online cross-browser test tool that contains a variety of platforms for various browsers that will take screenshots of your site because it is too popular, so have to queue.
Netrenderer
Test for different versions of IE, even the IE9 will be included.
Browsrcamp
The free version supports the Safari 3.1.2 test on Mac, and the billing version includes more Mac browsers.
Adobe Browserlab
A veteran Cross-browser test platform.
Litmusapp
The feature is that you can get a complete cross browser compatibility test report, and the free version is limited to IE7 and Firefox 2.