Mindshare Labs, Inc.

Allows WordPress users to subscribe to email notifications for new posts, pages, and custom types, filterable by taxonomies. The plugin supports tons of actions and filters too! More documentation will be coming soon.
<h4>Features</h4>
We are now working on a major rewrite of this plugin which will allow us to more rapidly roll out new features. Stay tuned for version 0.2.
<ul>
<li>send mail as plain text or HTML (by user preference)</li>
<li>integrated email template editor</li>
<li>option to use PHP template instead of integrated template editor</li>
</ul>
<h4>Upcoming Features</h4>
<ul>
<li>option to separate different taxonomies on profile update</li>
<li>widget</li>
<li>option to post notifications for update as well as new posts</li>
<li>html/plain text options</li>
<li>scheduling options / digest mode</li>
<li>analytics options</li>
<li>minimum role option for notifications</li>
<li>double opt-in</li>
<li>SMS text messages</li>
<li>integration with 3rd-party SMTP servers and/or advanced SMTP settings</li>
<li>integration with MailChimp/Mandrill</li>
<li>integration with Constant Contact</li>
<li>integration with Aweber</li>
<li>notification on site (like Facebook)</li>
<li>subscriber management to settings</li>
<li>CSV subscriber export</li>
<li>list management for Roles, use-case wholesale / retail</li>
</ul>
Support development with a donation and let us know what features are most important to you!

Subscribr

Allows WordPress users to subscribe to notifications for new posts, pages, and custom types, filterable by taxonomies.

Simon Wheatley

This plugin is designed for administrators to share the task of moderating comments and publishing posts marked as “Pending Review”. It is NOT designed to notify non-admin subscribers of new comments or posts.
The plugin adds checkboxes to the WordPress profile page, allowing you to setup notifications for these events:
<ul>
<li>a comment is added</li>
<li>a comment is held pending approval</li>
<li>a post is pending review, </li>
<li>a post is published</li>
</ul>
If you have permission to edit other users, you can also setup notifications for them… so when you go on holiday, you can set a colleague to receive the comment notifications while you’re away.
Users can only receive notifications for comments if they have the authority to moderate comments, and can only receive post notifications if they have the authority to publish posts.
Plugin initially produced on behalf of <a href="http://twentysixlondon.com/" rel="nofollow ugc">Twenty Six</a>.
Is this plugin lacking a feature you want? I’m happy to discuss ideas, or to accept offers of feature sponsorship: <a href="http://www.simonwheatley.co.uk/contact-me/" rel="nofollow ugc">contact me</a> and we can have a chat.
Any issues: <a href="http://www.simonwheatley.co.uk/contact-me/" rel="nofollow ugc">contact me</a>.

Email Alerts

Allows users to configure whether they wish to be alerted when a comment is added, comment held, post posted.

Subscribr vs Email Alerts