Kenny Zaron

This plugin allows for network administrators on WordPress multisite environments to send an email to users that 
they select based on the users’ roles in individual sites. For example, checking only “editors” will go through 
each active site and add anyone with the role of “editor” to your list of emails to send to.
To use the plugin after installation & activation, find Users / Mass Email in the network admin dashboard in your 
multisite install. Then, select the user types you wish to email and click on the button for “Load the List”. This 
will load the list of users to email. Then you may compose your email in the boxes provided and click the send 
button at the bottom of the screen. If all goes well you will be presented with a confirmation page indicating 
that your email was sent successfully.
This plugin is NOT intended for administrators to be sending unsolicited spam to their users. In fact, it was 
created with more formal environments in mind. One example would be a University setting where administrators 
of the network may need to notify students and faculty of potential downtime. With the plugin’s implementation 
I would imagine it would be a highly inefficient way of sending spam anyway.

Network Mass Email

Allows network admins to send a manually created notification email to all registered users based on user role.

kodeala

Reorder Multisite Sites Dropdown gives WordPress Multisite administrators a powerful tool to organize the My Sites dropdown in the WordPress Admin Bar. With this plugin, you can customize how sites appear in the admin bar so they are easier to find and better organized for your workflow. It is especially useful for WordPress Multisite networks with many sites where the default alphabetical ordering becomes difficult to manage, enhancing the existing WordPress multisite admin bar experience without modifying WordPress core functionality.
With this plugin, you can:
<ul>
<li>Reorder sites in the My Sites dropdown using drag-and-drop.</li>
<li>Manually set ordering using number input fields for quick repositioning.</li>
<li>Create groups to organize related sites together.</li>
<li>Add divider lines to visually separate sections.</li>
<li>Nest sites inside groups for better structure.</li>
</ul>
The ordering interface is available in the Network Admin under Settings > Reorder My Sites

Reorder Multisite Sites Dropdown

Adds advanced ordering controls to the WordPress Multisite My Sites admin bar dropdown, allowing administrators to organize sites with drag-and-drop,  …

Network Mass Email vs Reorder Multisite Sites Dropdown