You can easily clone existing WordPress websites to completely new ones in just a few seconds with all content, theme option and plugin configurations etc.
You can copy or convert terms between different taxonomies like categories, tags and other custom taxonomies wither created by you manually or present with some activate plugins and theme. Taxonomy Converter is the new WordPress plugin based on Categories to Tags Converter. The plugin allows you to copy (duplicate) or convert (move) terms from one taxonomy to another or to multiple taxonomies while maintaining associated posts.
Install and activate Taxonomy Converter plugin then visit Dashboard -> Tools -> Import screen and click on Taxonomy Converter.
Simple Copy Post Button plugin allows you to duplicate WordPress posts, pages and other post type (both published & drafts) in one click.
WordPress plugin repository has a new contact form plugin called Responsive Contact Form. This is the easiest among all contact form plugins and allows you to insert beautiful AJAX powered contact form anywhere in your WordPress site.
Using Content Mirror plugin you can easily mirror your WordPress site content from one page or post to another, even you can do this between subsites in a WordPress multisite network.