Ruven

This plugin registers a widget to display links to your social networks. 
It uses font icons to display the links.
The following networks are supported:
<ul>
<li>Dribbble</li>
<li>Facebook</li>
<li>Flickr</li>
<li>GitHub</li>
<li>Google+</li>
<li>Instagram</li>
<li>LinkedIn</li>
<li>Pinterest</li>
<li>RSS</li>
<li>StumbleUpon</li>
<li>Tumblr</li>
<li>Twitter</li>
<li>Vimeo</li>
<li>YouTube</li>
</ul>

Ruven Themes: Social Widget

RT Social Widget adds a widget to display links to your social networks.

telepathy

kynatro

A simple, easy to use, easy to configure social bar that will allow a user to add social share links to their WordPress website. This plugin came from the idea implemented with the popular Share Bar plugin (https://wordpress.org/extend/plugins/sharebar/), but offers many improvements:
<ul>
<li>Completely new, easier to understand code base making it easier for possible community contribution and personal customization</li>
<li>No additional database tables, but instead utilizes a private custom post type for social link buttons</li>
<li>Better control over where the bar appears allowing for per-post type filtering</li>
<li>Less obtrusive implementation for better caching and minification plugin compatibility as well as control over when the plugin is loaded</li>
<li>Simpler administrative interface with drag and drop ordering capabilities</li>
</ul>
Works in IE7+, Firefox 2+, Chrome 2+, Safari 3+ and Opera 9+; vertical following does not work in IE6. Utilizes jQuery for JavaScript processing, although it is setup to work properly with other libraries, your experience may vary. Requires PHP 5.2+.
This plugin is free to use and is not actively supported by the author, but will be monitored for serious bugs that may need correcting.

Simple Social Bar

A simple, easy to use, easy to configure social share bar that follows you down the page for sharing your posts.

Ruven Themes: Social Widget vs Simple Social Bar