Pigi

Using this small plugin you’ll be able to deliver content Around the web.
You can choose what Social Network website include in your post; what layout use to this plugin between:
<ul>
<li>Horizontal (default)</li>
<li>Vertical</li>
</ul>
Supported Website:
<ul>
<li>Facebook</li>
<li>Twitter</li>
<li>Friendfeed</li>
<li>StumbleUpon</li>
<li>Feed RSS DELIVERY</li>
<li>Digg</li>
<li>Google Buzz</li>
<li>Yahoo Buzz</li>
</ul>

Social Network Sharer

Using this small plugin you'll be able to deliver content Around the web.

Anthony Hayes

Unrestricted Social Network Auto Poster WordPress Plugin 
Add Unlimited Accounts For Each Social network Site & On Unlimited WordPress Installs! 
Social Syndication Commando Overview Video
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/E7dY-KZm67c?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>

Social Syndication Commando

Unrestricted Social Network Auto Poster WordPress Plugin. Add mutiple accounts for 10 social sites

Social Network Sharer vs Social Syndication Commando