Developing mobile website is not just the thing which would attract mobile audience. Just like general website, you need to test your mobile website as well with different point of view. Here are few tools and website through you can test your mobile website.
Marketcircle.com/iphoney/ : When developing website for Phone, 320 *420 is the ideal pixel browsing to set for. This tool will provide you perfect browsing environment to test your 320 *480 website and its look.
Ipadpeek.com : It is Ipad simulator which requires website name as an input and will automatically generate the test result page for website. You will be able to check your website design how it looks on IPad.
Validator.w3.org/mobile/ : Just like general website, it validates your mobile web pages and provide you solution if there will be any errors on page.
Ready.mobi :It is the ultimate tool to test your mobile websites especially used if you have hosted your website on mobile sub domain. It provides detail error page, test W3c validation and other useful information without having live website.
Gomez.com :After developing website, it is mandatory to check its performance on various mobile device and handsets. It will allow you to confirm cross device compatibility.