Ajay Patel

This plugin will help you to display your Twitter Followers & Rss Subscibers Stats.
As we increasingly depend on more and more social services, there rises the need to provide a simple way to let our website visitors take part of our diverse social presence. This plugin will help you to display your WordPress Blog/Site Twitter Followers & Rss Subscibers Stats at the desired sidebar in the WordPress Widgets.
How this plugin helps you to increase your Twitter Followers & Rss Subscibers?
<ul>
<li>Show your visiters your Twitter Followers & Rss Subscibers Stats.</li>
<li>According to your Twitter Followers & Rss Subscibers Stats visitors may like to Follow / Subscibers your WordPress Blog/Site.</li>
<li>Increase your Twitter Followers & Rss Subscibers.</li>
</ul>

TwitterRSS Stats

Simple plug-in that displays your Twitter Followers & Rss Subscibers Stats. Just activate & setup this widget.

Matthias Pfefferle

IndieWeb

joshfraz

This plugin is a simple way to let people know in real-time when your blog is updated. PubSubHubbub/WebSub is widely adopted and is used by Google Alerts and many other services. Subscription requests are relayed through hubs, which validate and verify the request. Hubs then distribute new and updated content to subscribers when it becomes available.
This plugin:
<ul>
<li>Sends realtime notifications when you update your blog</li>
<li>Supports multi-user installations (WordPress MU)</li>
<li>Supports multiple hubs</li>
<li>Supports all of the feed formats used by WordPress, not just ATOM and RSS2</li>
<li>Supports latest specs
<ul>
<li>PubSubHubbub <a href="https://pubsubhubbub.github.io/PubSubHubbub/pubsubhubbub-core-0.4.html" rel="nofollow ugc">Version 0.4</a></li>
<li>WebSub <a href="https://www.w3.org/TR/websub/" rel="nofollow ugc">W3C Version</a></li>
</ul>
</li>
<li>Announces which hubs you are using by adding <code><link rel="hub" ...></code> declarations to your template header and Atom feed</li>
</ul>
By default this plugin will ping the following hubs:
<ul>
<li><a href="https://pubsubhubbub.appspot.com" title="Demo hub on Google App Engine" rel="nofollow ugc">Demo hub on Google App Engine</a></li>
<li><a href="https://pubsubhubbub.superfeedr.com" title="SuperFeedr" rel="nofollow ugc">SuperFeedr</a></li>
<li><a href="https://websubhub.com" title="WebSubHub" rel="nofollow ugc">WebSubHub</a></li>
</ul>
Please contact me if you operate a hub that you would like to be included as a default option.

WebSub (FKA. PubSubHubbub)

Best Update Plugin

A better way to tell the world when your blog is updated.

TwitterRSS Stats vs WebSub (FKA. PubSubHubbub)