Stephanie Leary

This new template tag generates a list of registered users. The post author and users who have commented on the post are crossed off the list; any users who have not yet commented are left alone.
Options:
<ul>
<li>exclude the admin user</li>
<li>choose the minimum user role to be show in the list (e.g. Contributor, Author, etc.)</li>
<li>sort the list by user ID, display name, first name, last name, or login</li>
<li>choose the categories in which to show the list</li>
</ul>
This plugin requires PHP 5.10.

Comment Author Checklist

This new template tag generates a list of registered users. The post author  and users who have commented on the post are crossed off the list.

Mark Jaquith

Joen Asmussen

Subscribe to Comments is a robust plugin that enables commenters to sign up for e-mail notification of subsequent entries. The plugin includes a full-featured subscription manager that your commenters can use to unsubscribe to certain posts, block all notifications, or even change their notification e-mail address!

Subscribe to Comments

Subscribe to Comments allows commenters on an entry to subscribe to e-mail notifications for subsequent comments.

Comment Author Checklist vs Subscribe to Comments