larjen

A WordPress plugin that sanitizes tags in posts.
If you add the following tags to your posts they will be transformed like this:
<pre><code>"joe" -> "Joe" (capitalized first letter) "iMac" -> "iMac" (no change) "googletranslate" -> "Google Translate" (Transformed tag) "Wordpress" -> "WordPress" (small p changed to capital P) </code></pre>
It is also possible to alter the tag mappings from within the plugin controlpanel.

WPTagSanitizer

A WordPress plugin that sanitizes tags in posts.

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.

WPTagSanitizer vs WP Social Bookmarking Light