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Clean removal of outdated events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).

studionet

You can synchronize your real estate WordPress site with the Gedeon API : http://api.gedeon.im/doc.
Currently supported themes are : 
* WPCasa based (http://wpcasa.com) 
* Realto (http://themeforest.net/item/realto-wordpress-theme-for-real-estate-companies/6801549) 
* Decorum (http://themeshift.com/theme/decorum/)
More themes are coming soon !

WP Real Estate Sync

Synchronize your properties from your real estate software to your Wordpress website !

Multisite Event Sync vs WP Real Estate Sync