tranthethang

Ajax load and append a list of sharing button to single-post, static-page. Ex: facebook, twitter, pinterst, google-plus, linkedin.
After event window.load, your website send an ajax request, and get back a list of socials link. And append it to the end of “the_content”.
This plugin only working with is_singular().
<h3>Documentation</h3>
<a href="http://colourstheme.com/forums/forum/wordpress/plugin/ak-sharing-buttons/" rel="nofollow ugc">Documentation</a> is available on ColoursTheme.

AK Sharing Buttons

Ajax load and append a list of sharing button to single-post, static-page. Ex: facebook, twitter, pinterst, google-plus, linkedin.

inboundrocket

jcvangent

Selection Sharer makes it super easy for your readers to share your content and drive new visitors to your site. With Selection Sharer, any visitor on your website/blog can easily 
highlight any part of your content and share it immediately on Twitter, Facebook, LinkedIn or via email. Ultimately, the more your readers share, the more new traffic your site will get.
When a visitor highlights some text on your WordPress website they will be presented by a Medium like popover menu to share their highlighted content. This plugin supports both desktop (with a pop-over) as well as mobile devices (with a pop-under). This plugin is made possible by the excellent work done by <a href="https://github.com/xdamman/selection-sharer" rel="nofollow ugc">@xdamman</a> and is based on his code.

Selection Sharer by Hans van Gent

Works great!

Medium like popover menu to share on Twitter, Facebook, LinkedIn or by email any text selected on the page.

AK Sharing Buttons vs Selection Sharer by Hans van Gent