Pete Mall

<p>This plugins enables you to add the official <a href="http://blog.twitter.com/2010/08/pushing-our-tweet-button.html" rel="nofollow ugc">Tweet Button</a> from Twitter. It lets your users share links directly from the page they’re on. When they click on the Tweet Button, a Tweet box will appear — pre-populated with a shortened link that points to the item that they’re sharing.</p>


WP Tweet

Adds the official Tweet Button from Twitter.

svrooij

<p>Adds the official tweet button, to your site as a sidebar widget. You can use a twitter account for the entire site, or use personal accounts per author.</p>


Personal Tweet Me Button

Adds the official tweet button, to your site as a sidebar widget. You can use a twitter account for the entire site, or use personal accounts per auth …

WP Tweet vs Personal Tweet Me Button