Cross Browser Compatibility TestingCross browser testing is a type of compatibility testing designed to ensure that a web application behaves correctly (sometimes identically) in several different browsers and/or browser versions.[Source]
Cross Browser Testing Tools:
1. Adobe Browser Lab
You can have it's complete set of feature list here and other FAQs on subscriptions and access here.
Browsershots makes screenshots of your web design on different operating systems and browsers. It is a free open-source online web application providing developers a convenient way to test their website's browser compatibility in one place. When you 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 screenshots and upload them to their central dedicated servers for review.
If you want to contribute and go for priority processing see here.
SuperPreview was built to simplify the process of testing and debugging layout issues across different web browsers and platforms. You can view your pages in multiple browsers simultaneously or view how a page renders in a browser and compare it to a comp or mock-up image of a page.
SuperPreview was designed to integrate well with Expression Web. SuperPreview will be included as part of a future version of Expression Web. The final feature set and its availability have not been announced.
You can download the beta version for IE from here.
4. LitmusApp: Browser-Testing
You can see all its features and pricing.
It has a free trial limited to 1 hour usage, 1 per person.
See other FAQs on crossbrowsertesting and "testing configurations" for Cross Browser Compatibility here. For other plans and cost see here.
It requires a plug-in download. Spoon enables users to launch desktop applications from the web with no install, so you can test and use applications instantly, wherever you are. Know more about spoon here. Also see other FAQs on Spoon.
See all of the Browsrcamp's features here and the plans starts from 15 €/month for 150 minutes of testing. Usage is calculated to the minute.
Browser Photo lets you see how your pages look on different browsers and operating systems. You can see all its features here and find the complete tutorial here.
Browsera tests and reports cross-browser layout differences and scripting errors on your site. See all features of Browsera. Get all Plans & Pricing here.
BrowserSeal is a fast and easy to use cross browser testing and screenshot tool. It allows you to capture an image of your web site under multiple browsers with a single click of a mouse and instantly inspect the differences. It supports Internet Explorer (IE6, IE7 and IE8), Firefox (3.0 and 3.5), Google Chrome, Opera (8, 9 and 10) and Safari (3 and 4). Starting from version 2.0 BrowserSeal supports mobile browser testing with Opera Mini 5.1. It is heavily optimized for speed, which is especially evident on large web pages with scrollbars.
You can get a free download here.
See all FAQs here or if you want to buy it, go here.
11. Cloud Testing: Cross Browser Testing
The Cross Browser Testing feature of Cloud Testing allows you to verify both the look and feel and the functionality of your e-commerce and transactional websites using IE, Firefox, Safari, Chrome, Opera.
For all its features see here and all plans & pricing here.
12. Mozilla - addons
This is a great tool for web developers, since you can easily see how your web page displayed in IE with just one click and then switch back to Firefox. It works with Firefox 3.0 - 3.6a1pre.
You can download it here.
Lunascape 6 ORION - Lunascape has the world's only Triple Engine technology and now adds support for Triple Add-on. You can have the best features, performance, and speed of, Windows Internet Explorer, Mozilla Firefox, Google Chrome, and Apple Safari all in one browser. Also available as portable. Get all its features here. You can also download it for free here.
SortSite - Test for browser compatibility issues in the most common web browsers - Internet Explorer, Mozilla Firefox, Google Chrome, Apple Safari and Opera.
You can download the trial or buy it.
15. Multi-Browser Viewer
Multi-Browser Viewer is the leading Cross Browser Testing software.
You can see all its features here. You can download the trial or purchase it.