PResponsive

<p>This plugin will add a image below your posts, allowing your visitors to share your posts with their friends, on FaceBook, Pinterest, Google+, Twitter, Myspace, Friendfeed, Technorati, del.icio.us, Digg, Google, StumbleUpon, and other.  After plugin is activated a buttons will appear after the content of the post.Clicking this  button will bring the user to the  bookmarking site.  If the user isn’t logged in they will be prompted to do so.<br />
Post your articles to the social bookmarking sites and get traffic.</p>


WP Social Bookmarking

WP Social Bookmarking plugin syndicates your blog posts in social networking sites.

reedycat

<p>Convinient floating social buttons bar with about 40 active icons to share bookmarks in social services. Inspired by <a href="http://share42.com" title="share42.com" rel="nofollow ugc">Share42</a>.<br />
Live demo: <a href="http://wpsells.com/blog/wordpress-tech/215.html" title="Socialize It!" rel="nofollow ugc">Socialize It!</a>.</p>
<h3>Arbitrary section</h3>
<p>N/A</p>
<h3>A brief Markdown Example</h3>


WP Social Bookmarking vs Socialize It!