N4thaniel

Import users from a csv files and send a custom message using specific shortcodes.
You can choose capabilities for new users.
(original import csv script from AndyDunn)

CSV User Import with custom email message

Allows you to import a list and create users from a CSV files . Allows you to send a custom email with credentials

CPK Web Solutions

Most WP features are fully supported:
<ul>
<li>More than 50000 lines can be imported/exported (the only limit is your server)</li>
<li>Posts, pages, and custom post types</li>
<li>Tags, categories, and custom taxonomies </li>
<li>Custom fields (simple and complex)</li>
<li>Thumbnails</li>
<li>Flexible filter system to easily control which fields export</li>
<li>Simple User Interface (if you know Excel or another spreadsheet program, you will find this plugin quite easy) 
The plugin should now be usable with most plugins that are fully WordPress compliant.</li>
<li>Shortcode to allow frontend download by your visitors if you choose</li>
</ul>
Learn more <a href='http://cpkwebsolutions.com/wp-csv' rel="nofollow ugc">here</a> and read the full documentation including a <a href='http://cpkwebsolutions.com/plugins/wp-csv/quick-start-guide/' rel="nofollow ugc">quick start guide</a> and a description of all the kinds of fields you’ll see.
SUPPORT
We no longer provide any free support for the following <a href='http://cpkwebsolutions.com/plugins/wp-csv/support-and-donations' rel="nofollow ugc">reasons</a>.
If you see value in the plugin, <a href='http://cpkwebsolutions.com/donate' rel="nofollow ugc">support</a> it!

WP CSV

A powerful, yet simple, CSV importer and exporter for Wordpress posts, pages, and custom post types.

CSV User Import with custom email message vs WP CSV