WordPress removes the Update Services ability when you create a network. Activate this plugin to get it back.
ShipWorks for WordPress build a bridge between your E-Commerce sites on WordPress (such as WooCommerce) and ShipWorks.
Reblog posts accross the network, Share a post link from a blog to another blog on the same WP multisite network and include the post content !
Network: 1 create and share your text widgets in a multisites plateform
Add primary nav of parent blog to all child blogs.