Chris Clark

SocialList.org spreads your content across the Internet by making it easier for your website visitors to share it with other people. Social bookmarking sites are a popular way to store, classify, share and search links. In a social bookmarking system, users store lists of Internet resources, which they find useful. These lists are both accessible to the public or a specific network, and other people with similar interests can view the links by category, tags, or even randomly. Our simple yet powerful widget and plugins are very easy to install. SocialList Bookmarking Widget is the best tool to help your website visitors create a buzz for your site and increase its ranking and popularity.
<h3>Upgrade</h3>
<ol>
<li>First deactivate Sociallist</li>
<li>Remove the sociallist-social-bookmarking-widget directory</li>
<li>Unzip the sociallist-social-bookmarking-widget...zip file.</li>
<li>Upload the the sociallist-social-bookmarking-widget folder (not just the files in it!) in your 
wp-contents/plugins folder. If you’re using FTP, use ‘binary’ mode.</li>
<li>In your WordPress administration, go to the Plugins page</li>
<li>Activate the Sociallist plugin and a subpage for Sociallist will appear 
in your Options menu.</li>
</ol>

Sociallist

Allow websurfers to save and share interesting pages. The plugin appends widget for popular social bookmarking sites to the end of blog’s posts.

Lopo Lencastre de Almeida

Automatically add links to your favorite social bookmarking site on your posts, pages and in your RSS feed. WordPress 2.6 or above and Sociable 3.4.1 or above is required, if you use an older version of those, please upgrade.
More info:
<ul>
<li>More info on <a href="http://yoast.com/wordpress/sociable/" rel="nofollow ugc">Sociable</a>, with info on how to add sites to it, and how to integrate it into your WordPress in other ways.</li>
<li>Check out the other <a href="https://wordpress.org/extend/plugins/profile/ipublicis" rel="ugc">WordPress plugins</a> by the same author.</li>
<li>Also at <a href="http://box.net/iPublicis4Wordpress" rel="nofollow ugc">iPublicis4Wordpress</a>.</li>
</ul>

DoMelhor for Sociable

Automatically add links on your posts, pages and RSS feed to your favorite social bookmarking sites. Requires Sociable 3.4.1 or above.

Sociallist vs DoMelhor for Sociable