Oriol

Twitter Tools – Google Analytics Tagger integrats with Alex King’s Twitter Tools to tag all the URL’s published with the Google Analytics Campaign.
The final URL will look like this: <code>http://www.foo.com/?utm_source=twitter&utm_medium=post&utm_campaign=social</code>
You can read more about it here: <a href="http://www.google.com/support/analytics/bin/answer.py?hl=en&answer=55578" title="Google Analytics URL Builder" rel="nofollow ugc">URL Builder</a>

Twitter Tools – Google Analytics Tagger

Tag all your URL's posted to twitter with Google Analytics tags using Twitter Tools

CoSchedule

This WordPress plugin allows you to easily create tweetable content for your readers. Use pullquotes and custom messages inside the body of your blog post to highlight your content for the reader and make it simple for them to share on Twitter.
This is a plugin by CoSchedule, the <a href="https://coschedule.com" rel="nofollow ugc">all-in-one content marketing editorial calendar for WordPress</a>.

Click To Tweet

This plugin allows you to create beautiful Click To Tweet boxes anywhere in your blog post.

Twitter Tools – Google Analytics Tagger vs Click To Tweet