A free program for Android, by MobiRise.com.

With this one, you can build websites that are totally responsive, that are optimized for use on mobile devices, and that look amazing on all devices, browsers, and operating systems. Ideally, you should aim to have all of these things at once. You are able to see a preview, from within the visual editor, of how different devices, such as desktop computers, mobile devices, and tablets, will display your website when users navigate to it. For example, you can see how desktop computers will display the website. For instance, you can view a preview of how the website will appear on a desktop computer.