roggie

Twitter Tools is great but currently lacks a simple function to send a Tweet from your site’s PHP. This plugin adds such a function, so you can send a Tweet by calling the function from your site’s PHP.
<a href="http://www.thehypervisor.com/really-simple-tweet/" rel="nofollow ugc">Changelog</a>
<a href="http://www.facebook.com/home.php?sk=lf#!/pages/The-Hypervisor/114689115238103" rel="nofollow ugc">Follow me on Facebook</a href></a>
<a href="http://twitter.com/thehypervisor" rel="nofollow ugc">Follow me on Twitter</a href></a>

Really Simple Tweet

Adds simple function to send a tweet. Accepts Twitter username and password as parameters, or gets them from Twitter Tools if available.

scibuff

Adds twitter search tags to the <a href="https://wordpress.org/extend/plugins/twitter-tools/" rel="ugc">Twitter Tools</a> 
automatic “New Blog Post” status using Twitter Tool’s <code>tweet_blog_post_url</code> hook. The plugin will 
add post tags as twitter search tags to the “New Blog Post” twitter status message (and also shorten 
the new post’s url using http://is.gd API).
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</li>
<li>WordPress 2.7 or newer</li>
</ul>

Twitter Tools Search Tags

Adds twitter search tags to the Twitter Tools automatic "New Blog Post" status using Twitter Tools.

Really Simple Tweet vs Twitter Tools Search Tags