jonrogersuk

<a href="https://wordpress.org/extend/plugins/twitter-tools/" rel="ugc">Twitter Tools</a> is an excellent plugin for posting notifications of new blog posts to <a href="http://twitter.com/" rel="nofollow ugc">Twitter</a>. However Twitter Tools just sends the URL to the new post normally which is then shortened by Twitter itself to a <a href="http://bit.ly/" rel="nofollow ugc">bit.ly</a> short link. This is done anonymously.
This plugin will replace the normal URLs sent by Twitter Tools to Twitter with su.pr URLs tied to your Stumble Upon account. You can then easily track the number of clicks from your Stumble Upon profile.
This plugin is based on <a href="https://wordpress.org/extend/plugins/twitter-tools-bitly-links/" rel="ugc">twitter-tools-bitly-links</a> by Viper007Bond
Requirements
<ul>
<li><a href="https://wordpress.org/extend/plugins/twitter-tools/" rel="ugc">Twitter Tools</a> be installed and activated</li>
<li>PHP 5.2.0 or newer (PHP4 is dead anyway)</li>
<li>WordPress 2.7 or newer</li>
</ul>

Twitter Tools: Su.pr Links

Makes the links that Twitter Tools posts to Twitter be API-created su.pr links so you can track the number of clicks and such via your su.pr account.

utahta

This plugin inserts social share links at the top or bottom of each post. 
For theme developers, social share links can be added by PHP code or by using shortcode. Check documentation for this use-case.
This plugin documentation can be found <a href="https://github.com/utahta/WP-Social-Bookmarking-Light/wiki" rel="nofollow ugc">here</a>.
This is the list of used social sites:
<ul>
<li>Hatena</li>
<li>Facebook Like Button</li>
<li>Facebook Share Button</li>
<li>Facebook Send Button</li>
<li>Twitter</li>
<li>Tumblr</li>
<li>Google Bookmark</li>
<li>Google +1</li>
<li>Delicious</li>
<li>Digg</li>
<li>reddit</li>
<li>LinkedIn</li>
<li>Instapaper</li>
<li>StumbleUpon</li>
<li>mixi Check</li>
<li>mixi Like</li>
<li>GREE Social Feedback</li>
<li>atode (toread)</li>
<li>LINE</li>
<li>Pocket</li>
<li>Pinterest</li>
</ul>

WP Social Bookmarking Light

This plugin inserts social share links at the top or bottom of each post.

Twitter Tools: Su.pr Links vs WP Social Bookmarking Light