Artberri

When someone comments on your blog and writes a comment with his/her URL, is leaving more information than you think. This plugin displays web pages and profiles of those users in the dashboard, so you can add them as friends if you are in the same social network.
This is possible thanks to the Google Social Graph API. The profiles are showed because the commenter claims them as its owner on his web linking them with <code>rel="me"</code>. The ones which are with italic font are not reliable and they could not be of the user.
Comments, questions and bug reports are welcome: <a href="http://www.berriart.com/meet-your-commenters/" title="Meet Your Commenters" rel="nofollow ugc">http://www.berriart.com/meet-your-commenters/</a>

Meet Your Commenters

Displays web pages and social networks' profiles of your commenters in the dashboard.

ifkooo

Put all social network in one login box for your blog.
Collect all users to your Email Invest account and send free promotions or bulletins to them.
<h3>One Login API</h3>
This PLUGIN require a API Class file from One_login to make connections between your blog and your one-login account.

One-Login

All networks in one box to login in your blog

Meet Your Commenters vs One-Login