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.

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fabiancz

This plugin adds a set of cool icons and widgets at the end of your post for your readers to share. Widgets are Twitter, Facebook and Google +1. It supports large icons and small icons.
This plugin is copy of “simple-social-sharing-widgets-icons”, because it’s not updated;

Simple Social – Sharing Widgets & Icons Updated

Adds a set of cool icons and widgets at the end of your post for your readers to share.

Sociallist vs Simple Social – Sharing Widgets & Icons Updated