Konstantin Obenland

This plugin empowers you to take full control over your email communication by allowing you to easily customize the sender name and email address for all emails sent from your WordPress site. With this user-friendly plugin, you can ensure your emails represent your brand and identity, enhancing the professionalism of your website. Whether you’re sending newsletters, notifications, or contact form responses, this plugin lets you personalize the sender information, making your emails more engaging and trustworthy. Say goodbye to generic email senders and create a more personalized and memorable user experience with Custom Email Sender for WordPress.

Change From Address

Allows you to change the default email address and sender name for emails sent by WordPress.

This plugin adds the Retaggr functionality to your blog.
** IDENTITY **
The Retaggr Profile Card is about identity – its a virtual, interactive business card which you can customize as you wish. 
Widgets can be added into it to show posts from your blog,music you’re currently listening to, allow communication via IM, or pretty much 
Consolidate all your identity widgets on your blog into one, and add custom widgets from anywhere on the web. Built-in widgets include support for Twitter, FriendFeed, Flickr, MSN, and Disqus, to name a just a few.
People use Retaggr Profile Cards to bring traffic to their blog and express their identity. A demo can be found at retaggr.com.
Installing this plugin means :
<ul>
<li>Your visitors can leave their retaggr card when they comment on your posts</li>
<li>When referring to other people in a post, you can insert their profile card, instead of just linking to their blog. </li>
<li>Your card is attached to your posts</li>
</ul>
These unintrusive enhancements add context to your posts – bringing fun and useful functionality to your site, while keeping readers from unnecessarily navigating away to find out more about the person in question.
retaggr also allows you to add site specific widgets to card on your site – explore retaggr.com for more details.
** IMAGE TAGGING **
This plugin also gives your blog powerful image tagging functionality. Your users can tag people in any image on your blog, much like you would on a social network. 
Just drag around the person in the image and select the name from your address book, which is integrated with your email or Facebook. 
Mousing over the person then shows their retaggr Profile Card. There are full moderation and notification options.
You do not need to modify any of your template files — just activate the plugin, and set your options on retaggr.com.
<h3>Feedback/ Help</h3>
Don’t hesitate to drop us a line via the retaggr.com website if you need anything at all.

retaggr

This plugin adds the Retaggr functionality to your blog.

Change From Address vs retaggr