The MainWP Favorites Extension allows you to store frequently used plugins and themes for quick and easy installation on child sites. Also, since those favorites are stored locally on your MainWP Dashboard and do not use the WordPress.org Favorites API, your privacy is maintained.
The Favorites Extension even allows you to group your plugins and themes based on any criteria you want. Say that you use a different set of plugins or a different theme for sites in the “Blue Widget” niche compared to your sites in the “Yellow Widget” niche. You can set your Favorite Groups to install the correct plugins for the right niche easily.