Robin Good: Adobe Shadow is a cross-platform software as well as a mobile app that allows you to preview the layout of any web page across any number of different mobile devices easily.
To make Adobe Shadow work you only need to install the software on your Mac or PC, as well as on the mobile devices you want to test your web pages on.
"I love using Adobe BrowserLab. It’s a great way to check how your sites look on different browser platforms.
But I’m even more excited about Adobe Shadow, a new Adobe Lab that allows you to test your web sites on mobile devices by creating a dynamically-updating connection between your devices.
In layman’s terms, this means that you can visit a web site on your desktop browser and simultaneously preview it on multiple phones and tablets.
So, as you browse through different pages on your desktop, the mobile devices also update their screens."
(Source: Ray Villalobos on Lynda.com)
Download Shadow for Mac or PC: http://labs.adobe.com/downloads/shadow.html
Shadow for iOs: http://www.adobe.com/go/sd_ios_app
for Android: http://www.adobe.com/go/sd_android_app
More info: http://labs.adobe.com/technologies/shadow/