rexgoode

**Forum Restrict* is a plugin that allows an administrator to restrict certain forums to certain users. It also allows users to apply for admission to certain forums and for the administrator to approve those applications.
Plugin Features:
<ul>
<li>Mark certain forums as restricted (by Forum Restrict), meaning they can only be viewed by users an admin assigns as a member of the forum.</li>
<li>Mark or unmark certain users are members of certain forums.</li>
<li>Search for users to manually add to forums.</li>
<li>Allow users to apply to be members of a restricted forum.</li>
<li>Approve applications to join restricted forums.</li>
</ul>

Forum Restrict

A plugin that allows restricting forums to certain users.

dFactory

<a href="http://www.dfactory.eu/plugins/bbpress-notifications/" rel="nofollow ugc">bbPress Notifications</a> allows you to automatically send email notifications to specific users when new topics or replies are posted. It integrates seamlessly into WP, by adding new section to bbPress settings page, where you can configure your notifications.
For more information, check out plugin page at <a href="http://www.dfactory.eu/" rel="nofollow ugc">dFactory</a> or plugin <a href="http://www.dfactory.eu/support/forum/bbpress-notifications/" rel="nofollow ugc">support forum</a>.
<h4>Features include:</h4>
<ul>
<li>Send notification when New Topic is published</li>
<li>Send notification when New Reply is published</li>
<li>Specify email addresses for notifications</li>
<li>Design email templates with a number of shortcodes</li>
<li>Available shortcodes: [blogname], [reply-title], [reply-content], [reply-excerpt], [reply-url], [reply-author], [topic-title], [topic-url], [topic-author]</li>
<li>.pot file for translations included</li>
</ul>

bbPress Notifications

bbPress Notifications allows you to automatically send email notifications to specific users when new topics or replies are posted.

Forum Restrict vs bbPress Notifications