andeggs

ProSocial is a free WordPress plugin which connects your readers with your authors.
It shows an attractive pop-up bar next to your authors’ names, with links to their social media accounts.
On multi-author blogs, it’s a great way of encouraging your readers to connect with your authors on other social networks.
See it in action here: http://digitalshift.me/prosocial/
Features:
<ul>
<li>40+ social networks: You choose which networks to display. Your authors can add then their accounts themselves.</li>
<li>Includes email: Show your authors’ email addresses as well (with a captcha form to prevent spam).</li>
<li>Google Analytics: If you use Google Analytics, you can see who’s clicking on what.</li>
</ul>

ProSocial

ProSocial shows a pop-up bar next to your authors' names, with links to their social media accounts.

tarek.chida

Share-me is a simple social share plugin. 
Share your posts on multiple Social Networks with different icons sets. 
Share-me is able to deal with new icons sets added. 
No ads no sniffing scripts… just a simple and a clean way to share posts! and its Responsive 🙂
You can choose : 
Horizontal position Left/Right 
Vertical position Before/After post 
Icons size 16 px / 20 px / 32 px
Included social Networks : 
Facebook 
Twitter 
Googleplus 
Tumblr 
Linkedin 
Blogger
 New : You can share post using mail
Included Icon Sets : 
Apricum 
Cercle 
Elegent 
Leaf 
Minimalist 
Ribbon 
Simple 
Square 
Shaded

ShareMe

Share-me is a simple social share plugin.

ProSocial vs ShareMe