GeekRMX

This plugin allows you to easily add Twitter @Anywhere to your blog, enabling the @Anywhere features:
<ul>
<li>Auto-linkification of @usernames</li>
<li>Hovercards</li>
<li>Follow button</li>
<li>Tweet Boxes</li>
<li>Retweet button</li>
</ul>
You can enable and configure each function from the plugin settings page:
<ul>
<li>Customize the label, content and dimensions of your Tweet Boxes.</li>
<li>Display the post title and short URL into the Tweet Box.</li>
<li>Shorten your URLs with bit.ly or is.gd.</li>
<li>Insert custom Tweet Boxes by using shortcodes.</li>
<li>Clicking the Retweet button will launch a special Tweet Box with Lightbox effect (<a href="https://wordpress.org/extend/plugins/twitter-anywhere-plus/screenshots/" rel="ugc">screenshot</a>).</li>
<li>Choose from two Twitter birds to be displayed above the Retweet Box 🙂</li>
</ul>
Languages:
<ul>
<li>English (en_US)</li>
<li>Spanish (es_ES)</li>
<li>French (fr_CA)</li>
<li>Belorussian (be_BY)</li>
</ul>
In order to use @Anywhere, you must first register your blog for a free API key with Twitter. You can do so at the following URL: http://dev.twitter.com/anywhere/apps/new (<a href="https://wordpress.org/extend/plugins/twitter-anywhere-plus/faq/" rel="ugc">FAQ</a>)
<a href="http://www.ngeeks.com" rel="nofollow ugc">nGeeks.com</a>
<h3>Translations</h3>
<ul>
<li>English (en_US) [default]</li>
<li>Spanish (es_ES)</li>
<li>French (fr_CA) – <a href="http://siliticx.ca" rel="nofollow ugc">Charles Desaulniers</a></li>
<li>Belorussian (be_BY) – <a href="http://pc.de" rel="nofollow ugc">Marcis G.</a></li>
</ul>
You can help translating the plugin into your language. 
Use the <code>tap-default.po</code> file included with the plugin.

Twitter @Anywhere Plus

This plugin allows you to easily add Twitter @Anywhere to your blog, enabling the @Anywhere features.

LinksAlpha

Get Support: support@linksalpha.com
Plugin shows Twitter users who recently tweeted links from your blog. In other words, quick and easy way to get your Twitter community rolling 🙂
Plugin shows Tweets linking your Blog posts. Tweets show up below the comment form on each blog post
Plugin shows Count of Tweets linking to your blog. Count can be configured to show next to “Comment Count” or “Blog Post Date” for each blog post.
Check out our other plugins that you will find extremely useful:
<ul>
<li>Social Discussions: show popularity of your blog posts on Social Networks including Twitter, Facebook, Google Buzz, Yahoo, and bit.ly. https://wordpress.org/extend/plugins/social-discussions/</li>
<li>Social Stats: track your blog activity on social networks – monthly/weekly/daily, and track your popular posts. https://wordpress.org/extend/plugins/social-stats/screenshots/</li>
<li>Network Publisher: auto publish your blog posts to Twitter, Facebook, LinkedIn, Yahoo, Yammer, Identi.ca, and MySpace. https://wordpress.org/extend/plugins/network-publisher/</li>
<li>Buzz Roll: let your users share your blog post on fastest growing social hub – Google Buzz. https://wordpress.org/extend/plugins/buzz-roll/screenshots/</li>
</ul>

Twitter @Anywhere Plus vs Retweeters