WPAPP.NINJA

Create shortcode to add social share link to your posts, sidebars, widgets, …
<ul>
<li>[socialninja network=”twitter”]</li>
<li>[socialninja network=”facebook”]</li>
<li>[socialninja network=”google”]</li>
<li>[socialninja network=”linkedin”]</li>
<li>[socialninja network=”pinterest”]</li>
<li>[socialninja network=”reddit”]</li>
<li>[socialninja network=”digg”]</li>
</ul>
Inject automatically, to all your posts, Open Graph meta tags and Twitter Cards:
<ul>
<li>og:type</li>
<li>og:title</li>
<li>og:description</li>
<li>og:url</li>
<li>og:site_name</li>
<li>og:image</li>
<li>twitter:card</li>
<li>twitter:domain</li>
<li>twitter:image:src</li>
</ul>

SOCIAL.NINJA

Optimize your SEO with Open Graph meta tags, Twitter Cards and social share links.

ichurakov

The Open Graph protocol enables any web page to become a rich object in a social graph. For instance, this is used on Facebook to allow any web page to have the same functionality as any other object on Facebook.
To turn your posts and pages into graph objects, the plugin add the following metadata to webpage header: 
og:title – The title of your post/page. 
og:description – The excerpt of your post/page. 
og:image – URL of featured image (if exists) which represent your post/page. 
og:site_name – The title of website. 
og:url – The canonical URL of your post/page.
Plugin support page: <a href="http://www.icprojects.net/open-graph-meta.html" rel="nofollow ugc">Open Graph Meta</a>.

Open Graph Meta

This plugin add Open Graph meta data to blog posts and pages.

SOCIAL.NINJA vs Open Graph Meta