nticaric

Quoty is a simple plugin that lets you share any text selected on the page. 
Currently supported platforms are: Twitter, Facebook, LinkedIn, Pinterest and GooglePlus
Features
<ul>
<li>Automatically displays a nice pop-up menu on text selection (highlight)</li>
</ul>

Quoty

Great!

Bravo momci!

A simple plugin for sharing selected text to social networks.

Sibin Grasic

Select to Share WordPress plugin will allow you to easily display a nice pop-up menu on text selection. 
CSS selector option is provided so you can target only your post / page content.
Features
<ul>
<li>Automatically displays a nice pop-up menu on text selection (highlight)</li>
<li>Mobile fallback with pop-under sharing menu</li>
<li>Highly compatible – you can change the css selector for the text highlight</li>
</ul>

Select to Share

Nice

Show a nice pop-up menu on text selection for sharing on Facebook, Twitter and e-mail...

Quoty vs Select to Share