danielfaerber

If you install this plugin on your blog, your visitors get two buttons below your posts and pages:
<ul>
<li>A Facebook “share” button</li>
<li>and a Twitter “tweet” button.</li>
</ul>
These are not the standard Like- and Tweet-Buttons, which also display how many people have clicked on it so far, but basically pure and simple html-links.
DISADVANTAGE:
<ul>
<li>Less interaction.</li>
</ul>
ADVANTAGES:
<ul>
<li>It’s faster. Your blog does not have to contact Facebook’s and Twitter’s servers.</li>
<li>Better privacy. No information about your visitors is sent to Facebook or Twitter. Nota bene: Facebook’s standard like button allows Facebook to track your visitors even if they do not click on it!</li>
</ul>

Fastershare

This plugin allows your visitors to share your posts on Facebook and Twitter, without JavaScript or iFrames.

d-media

Automatically add InShare buttons to your posts. It works for single pages and loops. 
The plugin features an options page in which the following can be configured:
Display options:
<ul>
<li>Toggle hiding of button in loops </li>
</ul>
Display style:
<ul>
<li>Show button on top or bottom of post</li>
<li>Choose button display style (counter top,counter right,default)</li>
<li>Add breaks before and/or after the button</li>
<li>Button preview</li>
<li>Custom styling option, adds a containing div with classname which you can style in your stylesheet (new since 1.1)</li>
</ul>
<h3>Arbitrary section</h3>

LinkedIn InShare button

Automatically add InShare buttons to your posts. It works for single pages and loops and is display options are customizable.

Fastershare vs LinkedIn InShare button