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Clean removal of outdated events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).

Ooypunk

Once upon a time there was a website in the auld style, with imagery in an images directory. But then it was said that 
the website should be built anew, but in WordPress, and the images were transported by FTP to the new structure. But 
the new pages and posts needed images, but the images were not in the Library. 
This plugin scans the upload directory for images that are not yet in the Library, and provides links for each one to 
be included.

CIT Media Sync

Plugin to add files to the Media Library that were previously uploaded by FTP.

Multisite Event Sync vs CIT Media Sync