Don Caprio

As the name implies, this social sharing plugin is simple and loads pretty fast. The buttons do not rely on external resources to load, it’s written in PHP, HTML and CSS.
There’s an option to show the buttons on posts and pages. You can also put the buttons anywhere in your template using this template tag:
<pre><code><?php dc_social_share_tag(); ?>
</code></pre>
You can also display using this shortcode in single posts and pages:
<pre><code>[dc-social]
</code></pre>
Please note that these buttons do not show share counts. The essence of the whole thing is to keep it very simplified.
The only button that requires a little snippet of JS to work is the Pinterest button but this does not slow down your site in anyway. A demo of the plugin can be seen here: http://geek.ng/

DC Simple Share Buttons

A set of very simple social sharing buttons that loads pretty fast (no javascript, no images).

emostarxd

bogdan_nazar

This plugin adds some social functionality to WordPress. Such as FB comments, VK comments, share buttons etc. 
The main capabilities of this plugin is listed below:
<ul>
<li>Internal share buttons (G+,FB,VK,Twitter,Delicious,Pinterest,LinkedIn and more) with ability to select preffered ones.</li>
<li>The tools for ordering internal social buttons.</li>
<li>The tools for “ShareThis” buttons embedding. Instructions are present to get customized ShareThis data.</li>
<li>Facebook and Vkontakte comment widgets.</li>
<li>Option to order them.</li>
<li>Option to switch on/off each of widgets including WP internal comments.</li>
<li>Default language is set to English.</li>
<li>Already translated for russian users.</li>
<li>And more other options to cusomize data and view of comment widgets.</li>
</ul>
This list of available features will grow in the future releases.
<h3>License</h3>
Plugin is free for any use. Don’t delete the authorship note if you’ll going to modify source code under the your needs.

Social Monster

This plugin adds some social functionality to Wordpress. Such as FB comments, VK comments, share buttons etc.

DC Simple Share Buttons vs Social Monster