Boone Gorges

Requires WordPress 3.0+ Network Mode.
Allows blog administrators to add multiple users to blogs at a time, using only a list of email addresses. When the specified email address matches an existing account, the account will be added as a user on the blog. Otherwise a new account is created and the new user added with the specified role. Based on DDImportUsers.
The plugin determines username automatically from the email address. For example, the email address bgorges100@example.com will produce the email address bgorges100. For that reason, this plugin works best when used in schools or organizations with official, unique email addresses.
When BuddyPress is installed, the welcome email will also include a link to the new user’s Edit Profile screen.
This plugin was developed for Blogs@Baruch of Baruch College’s Bernard L Schwartz Communication Institute. http://blsciblogs.baruch.cuny.edu

Simple Import Users

Allows blog administrators to add multiple users to blogs at a time.

bobbingwide

vsgloik

This plugin enables you to filter posts in a particular category and then apply mass updates to selected posts.
Actions supported:
<ul>
<li>Update to selected category – Delete the currently filtered category and set a new Target Category for the selected posts</li>
<li>Add selected category – Adds the Target Category to the selected posts</li>
<li>Delete selected category – Deletes the currently filtered category from the selected posts</li>
<li>Republish – update the post date to the current time stamp.</li>
<li>Republish – alter the post date by adding or subtracting defined amounts</li>
<li>Update post meta – set the values for simple post meta fields</li>
<li>WordPress SEO hide – update WordPress SEO post meta to “hide” posts</li>
<li>WordPress SEO unhide – update WordPress SEO post meta to “unhide” posts</li>
</ul>
Scheduled republishing:
<ul>
<li>Scheduled republishing using WordPress CRON</li>
<li>Category republishing of the oldest post in selected Categories</li>
<li>Tag republishing of the oldest post with selected Tags</li>
<li>Republicizing using Jetpack publicize.</li>
</ul>

oik batchmove

Version 2.4 provides some additional actions that help you to mass set post meta data values, including values used by WordPress SEO (now Yoast SEO) to hide/unhide posts from the XML sitemap.



Easy way to hide/unhide posts from WordPress/Yoast SEO sitemap

The oik-batchmove plugin enables you to perform mass updates to the categories assigned to posts. It also enables you to republish posts.

Simple Import Users vs oik batchmove