Ron Rennick

The functionality in this plugin was incorporated into the built in export feature in WordPress 3.0
Working with a single large export file can be difficult. Use this plugin to create multiple export files that contain sections of your blog. This plugin has been tested on WP & WPMU versions 2.7 – 2.8.4. The plugin may work on earlier versions of WP/WPMU.
All restriction options provided in the plugin are optional. If no restrictions are selected, this plugin generates the same export file as the export feature built into WP & WPMU.
Features
Export by any optional combination of:
<ul>
<li>Date Range – Start & end month/year</li>
<li>Author – Same as WP/WPMU built-in export</li>
<li>Category – Export a specific category</li>
<li>Content type – Choose either posts or pages</li>
<li>Post status – Choose Draft, Published, Scheduled or Private</li>
<li>Blog Tag/Category Terms – Choose whether to include the blog’s complete list of Tags and/or Categories</li>
</ul>
Support can be obtained through:
<a href="https://wordpress.org/tags/advanced-export-for-wp-wpmu?forum_id=10#postform" rel="ugc">WordPress Forums</a>

Advanced Export for WP & WPMU

Adds an Advanced Export to the Tools menu which allows selective exporting of pages, posts, specific categories and/or post statuses by date.

Manuel Razzari

Patricio T

In WordPress Multisite, new sites get a boring default template, without any custom settings or starter content.
This plugin allows you to select a specific blog on your network, a “master” one, that will be cloned every time a new blog is created.
In this way, new blogs will contain all posts, uploads, theme settings and plugin options from the master blog.
<h4>How does it work?</h4>
<ol>
<li>It uses MySQL <code>INSERT INTO ... SELECT</code> to copy every table from the “master” blog into the new one. This is fast!</li>
<li>Then it does a search and replace on the new blog’s tables, to replace the old URL with the new one. 
This is done in a way that respects serialized arrays, so your plugin’s settings will be preserved. 
(We used a heavily trimmed down version of Interconnect/IT’s <a href="https://github.com/interconnectit/Search-Replace-DB" rel="nofollow ugc">Search and Replace</a> tool for that, so go thank them for this!)</li>
<li>It proceeds to copy all files from the <code>wp-content/uploads</code> dir of your master blog into the new one’s, so that all assets will work as expected.</li>
<li>Finally it does some house clean-up, updating the new blog’s title, admin email, and user roles as needed.</li>
</ol>
Go check the screenshots, it’s really simple and does what it says. 
Give it a try!
This plugin was handcrafted with love and ‘yerba mate’ by the team at <a href="http://www.tipit.net/" title="Sustainable Web development since 1996 in Austin, Texas" rel="nofollow ugc">Tipit.net</a>.

Multisite Cloner

I was looking for this for ages! Thanks for creating this awesome plugin, exactly what I need for my current projects!

Keep up the great work!

Awesome!

This plugin has never let me down and I've used it on scores of multi-sites.   I know (at the time of writing this review) it has not been updated in a while, but it's still brilliant.  The developer has said he will update when required, so don't be put off by the last update date.  Plus he responds to support questions.  What more can you ask for.

Thank you @manuelrazzari

I Love This Plugin

When creating a new blog on WordPress Multisite, copies all the posts, settings and files, from a selected blog into the new one.

Advanced Export for WP & WPMU vs Multisite Cloner