Simple Multisite Crossposting
Allows to publish posts, pages or custom post types to multiple blogs in your multisite network at the same time and then sync them.
Simple Meta Boxes
This plugin allows you to create meta boxes for posts, settings for taxonomy terms and custom option pages without affecting your website performance.
MailChimp Sync
This premium plugin automatically synchronizes your website users with MailChimp lists depending on their user roles or WooCommerce Memberships plans.
Multisite Indexer
How to query all posts or terms in a single loop within WordPress Multisite install. With working pagination.