You can use a separate theme in your site Home Page, Individual Posts & Pages, Post & Page Archives and other non-admin areas of your WordPress based website. Earlier we discussed about a WordPress plugin that allows you to assign a custom theme to individual posts and pages.
There are many different themes that automatically makes the frontend of your WordPress site mobile compatible but the problem comes with backend i.e., while accessing admin area dashboard from a smartphone device. This tutorial is on a simple plugin called Juiz Smart Mobile Admin, it offers you a smartphone support for your admin area dashboard.
There are many WordPress plugins you can use for adding apple touch icon and favicon in your WordPress site. This tutorial is on brand new WordPress plugin called Custom Favicon, the specialty of this plugin is that it provides you a very easy interface for uploading and default WordPress media uploader for uploading favicon images into your WordPress site.
Background Manager is a popular WordPress plugin that allows you to display random image as your WordPress websitebackground at each visit or as a timed slideshow without editing any theme file. The plugin lets you create a number of set of images from where an image is grabbed and displayed as your website‘s background. You can use your media library images, upload them from your computer or import them from third party sources. A live demonstration of Background Manager plugin is available at Background Manager Demo Site.
You can allow your users to preview themes without activating them, this way you can setup a website providing different downloadable themes to your users and easily allow them to preview each theme.