csfeijo

ContentShare use the API features of Twitter and Facebook to possibility add this buttons on your blog. 
For more informations about this features see the API URLs of this Social Networks.

ContentShare

ContentShare add buttons to share on Twitter and Facebook (Share and Like) on home page of your blog and on each post.

fabioz

Text to Share is a plugin that offers editors a neat way of how to share quotes that are within the various posts. All quotes would need be set via the WordPress Admin when adding or editing a particular post. This sharing tool would then allow visitors to share a quote on Facebook and Twitter.
The features of this plugin are:
For Admins and Editors
<ul>
<li>Simple and neat design</li>
<li>Selecting text to share with a click of a button</li>
<li>Easy to customise and style according to design of website</li>
<li>Increase engagement on major social networks</li>
</ul>
For Visitors
<ul>
<li>Simple sharing mechanism to Facebook and Twitter</li>
<li>Automatic redirect to social networks</li>
</ul>

Text To Share

Text to Share is a plugin that allows the visitor to share a selected quote on major social networks.

ContentShare vs Text To Share