replyPUSH

Much like WordPress.com’s “Comment Reply via Email”, you can reply to any post you subscribe to.
Integrates with the wonderful <a href="https://wordpress.org/plugins/subscribe2/" title="subscribe2" rel="ugc">subscribe2</a> and <a href="http://replypush.com" title="replyPUSH.com" rel="nofollow ugc">replyPUSH.com</a> service to provide the email reply magic.
It automatically adds notifications for comment posts to keep the conversation flowing 🙂
All the subscriber need do, is reply at the top of their quoted email notification.

Reply By Email

Allows your users to reply to articles / blog posts and comments via email.

Pippin Williamson

Allows you to create and quickly insert pre-defined responses in bbPress forum topics.
Once activated, a “Canned Replies” submenu will be added to the main Forums menu.
Create the pre-defined replies from this new menu. When responding to a forum topic, there will be a “Canned Replies” section added to the top of the “New Reply” form.
To insert a canned reply, click on the “Canned Replies” link then click “Insert” on the reply you wish to use.
If you have suggestions or bugfixes for the plugin, please report them on <a href="https://github.com/pippinsplugins/bbPress-Canned-Replies" rel="nofollow ugc">Github</a>.
Languages
Canned Replies for bbPress as been translated into the following languages:
<ol>
<li>English</li>
<li>French</li>
</ol>
Would you like to help translate the plugin into more languages? <a href="http://pippinsplugins.com/contact" rel="nofollow ugc">Contact Pippin</a>.

bbPress – Canned Replies

NIce plugin

Allows you to create and quickly insert pre-defined responses in bbPress forum topics.

Reply By Email vs bbPress – Canned Replies