AHK Softwaregutachten.at e.U.

This plugin allows you to automatically collect and display events from subsites within a WordPress Multisite installation on the main site. It supports:
<ul>
<li>Daily synchronization via cron job</li>
<li>Manual synchronization via admin interface</li>
<li>Selection of which subsites to include</li>
<li>Import and update of event content and metadata</li>
<li>Clean removal of outdated events</li>
</ul>
The plugin works with “The Events Calendar” and pulls <code>tribe_events</code> from each selected subsite into the main site’s event calendar.

Multisite Event Sync

Synchronizes events from subsites in a WordPress Multisite network into the main site's calendar (The Events Calendar plugin).

Steveorevo

SpectrOMTech

ServerPress

Dave Jesch

This plugin provides the ability to configure WPSiteSync with an HTTP Authentication username and password to be used when communicating with a Target server that is set up with Authentication.
Usage Scenarios:
If you’re using WPSiteSync with a staging server but want to limit access to the staging server via HTTP Authentication, this is the plugin for you.
This add-on plugin for WPSiteSync allows you to configure an HTTP Authentication username and password that will be used in communicating with the Target server; allowing you to PUSH and PULL changes from your local site to your password protected staging site.
This plugin works the same whether your Source Site is a local install via DesktopServer or other local development environment, or a publicly hosted site. For more information on DesktopServer and local development tools, please visit our web site at: <a href="https://serverpress.com/get-desktopserver/" rel="nofollow ugc">https://serverpress.com/get-desktopserver/</a>
How it Works:
The WPSiteSync for HTTP Authentication add-on plugin sends the username and password with each API request made to the Target site. This allows you to configure your Target site with .htaccess rules that will limit access to user that have the password.
Support:
<blockquote>
Support Details: We are happy to provide support and help troubleshoot issues. Visit our Contact page at <a href="http://serverpress.com/contact/" rel="nofollow ugc">http://serverpress.com/contact/</a>. Users should know however, that we check the WordPress.org support forums once a week on Wednesdays from 6pm to 8pm PST (UTC -8).
</blockquote>
ServerPress, LLC is not responsible for any loss of data that may occur as a result of using this tool. We strongly recommend performing a site and database backup before testing and using this tool. However, should you experience such an issue, we want to know about it right away.
We welcome feedback and Pull Requests for this plugin via our public GitHub repository located at: <a href="https://github.com/ServerPress/wpsitesync-httpauth" rel="nofollow ugc">https://github.com/ServerPress/wpsitesync-httpauth</a>

WPSiteSync for HTTP Authentication

It does what it says it does

It allowed me to configure my target site with .htaccess rules that will limit access to the user that has that password.

This worked like a charm.

Adds support for sites protected with HTTP Authentication via .htaccess rules.

Multisite Event Sync vs WPSiteSync for HTTP Authentication