If you are developing mobile web applications, you already experienced the difficulty of debugging them.

iWebInspector is a free tool for debugging, profiling and inspecting web applications that run on iOS Simulator (iPhone or iPad).

The tool simply attaches the Web Inspector to any tab opened in Safari for iOS, to a chrome-less web app (full screen) or to a PhoneGap application.

It enables us to:

• see and browse every element on your HTML element. You can change attributes, content and styles and see how they apply on Safari
• see all the resources involved in this page, including Databases, Local Storage, Cookies and ApplicationCache
• check all the network traffic on your website
• see all your scripts, create breakpoints, watches and debug your JavaScript code.
• record a timeline showing you rendering, scripting and loading times while you browse on Safari
• profile your JavaScript code
• audit your code, showing you a report on performance and other stuff
• see and use the JavaScript console

Simply, a great addition for mobile developers.

BrowserLab, a web-based service by Adobe, enables you to test websites on multiple browsers and OSs.

It is possible to create a custom browser set where the screenshots will be created only for those browsers (also helps speeding up the results).

Screenshots can be previewed in 2-up or onion-skin views which makes comparing multiple versions easier and x/y rulers can be used for sensitive measurements..

The service currently supports different Firefox, Safari and IE versions for Windows and Mac OS X. However, it is still in beta and new browsers are added within time.

BrowserLab is part of the Adobe CS Live and free for 1 year if you sign-up before April 30, 2011.

Although everyone tries hard to make websites work with every browser, they are generally not 100% compatible.

And, with the increasing usage of HTML5+CSS3, they are becoming incompatible with more and more browsers everyday.

Free The Foxes is a free JavaScript+HTML+CSS-based solution for displaying good-looking notifications to visitors with a incompatible browser.

With the help of a simple configuration file, it is possible to rate browsers and their versions where the notification window displays result according to these ratings.

The window also guides users to download a better browser with the options and their download links.

Browser Sandbox is an online platform which makes launching various browser versions possible.

It requires an installation of a plugin & can run:

• IE6-7-8
• Firefox 2-3-3.5
• Apple Safari 3-4
• Opera 9-10
• Google Chrome

The platform is definitely a gold mine for making cross-browser tests quickly & easily.

P.S. Spoon allows you to convert your own apps to Spoon apps & post them on the web. You can check the platform's homepage for that.

With many different operating systems, many browsers and different browser versions the design of a website can look different to every user.

Testing your website in different browsers easily is possible.

Browsershots makes screenshots of your web design in different browsers. It is a free open-source online service created by Johann C. Rocholl. 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 the central server.