lgils

When a user comes back to the site and reads a post, offer them the ability to share the article with their Facebook friends. This leads to more inbound traffic for you, and a faster, cleaner browsing experience for them.
After 1 week, it resets, and they have the option to share again.

SocialCurrency

Allow loyal readers to share articles with their Facebook friends in exchange for ad-free browsing!

Arjun Jain

WP Social sharing adds very attractive responsive social share buttons of Facebook, Twitter, Linkedin, Xing, Reddit and Pinterest to wordpress posts, page, media or any custom post type. This is very lightweight and simple social sharing plugin. This plugin provide option whether you want to include plugin CSS/JS or not. 
Most of the social sharing plugins uses images/api to display social share buttons, but this plugin created large social sharing buttons using CSS3. Also these social sharing buttons are responsive. For device width less than 480px these buttons converted into their respective icons.
Plugin Features
<ul>
<li>Social sharing support for Facebook, Linkedin, Reddit, Twitter, Xing and Pinterest.</li>
<li>Auto display to Post, Page, Media and Custom Post type.</li>
<li>Custom Social Button text. </li>
<li>100% responsive. </li>
<li>Reorder Social icon order easily.</li>
<li>No Image, button created using CSS3. For device width less than 480px, this plugin used one single image to display social icons.</li>
<li>Provide Shortcode, can integrated with any theme easily.</li>
<li>Social icon can be add before and after content</li>
<li>Add text before share buttons</li>
</ul>
Plugin Shortcode 
You can also use following shortcode
<pre><code>[wp_social_sharing social_options='facebook,twitter,linkedin,pinterest,xing,reddit' twitter_username='arjun077' facebook_text='Share on Facebook' twitter_text='Share on Twitter' linkedin_text='Share on Linkedin' pinterest_text="Share on Pinterest" xing_text="Share on Xing" reddit_text="Share on Reddit" icon_order='f,t,l,p,x,r' show_icons='0' before_button_text='' text_position='' social_image='']
</code></pre>
<a href="http://www.arjunjain.info/wp-social-sharing/" rel="nofollow ugc">Demo</a>
<h3>Support</h3>
<ul>
<li>Fill up this <a href="http://www.arjunjain.info/contact" rel="nofollow ugc">form</a> to leave comments,ask question,suggest new feature or directly mail at hello@arjunjain.info</li>
</ul>

WP Social Sharing

Adds very attractive responsive social sharing buttons of Facebook, Twitter, Linkedin, Reddit, Pinterest and Xing to wordpress posts, pages or media.

SocialCurrency vs WP Social Sharing