Plugins

Search users in the wp-admin dashboard using firstname, lastname email and more -- including an increasing number of custom user fields/columns.

Set up permissions for categories and taxonomies to admin users whose role is not "administrator"

Admin User Messages is a simple plugin that allows communication just between Admin and single users, but not a communication between user and user.

The plugin simplifies the WordPress admin user interface by hiding most of the WordPress menus.

Check whether the title matches other posts while adding or editing a post, page or custom post type in classic editor.

Adds autocomplete functionality to all taxonomy input fields in admin panel.

Improves the tag sections located in the admin backend (WordPress dashboard) classic editor post screens.

AdminSpeedo is a simple method of boosting your WordPress admin dashboard and freeing your site code from unnecessary and not needed items.

This creates a drop-down list of all sites in a multi-site install and lets you switch to the corresponding admin page of the other site.

The default WP Admin Toolbar (frontend) is moved to a right click menu (context menu).