Nagmay

Based on twitpress by Tom Purnell. Adds the ability to choose which category will result in updates to your twitter account.
TwitCategory sends a tweet notifying your followers that a new post has been published on your blog. It is very customizable, allowing you to format the tweets using static text and several variables: title, post, permalink, guid and category name.
New versions also allow for URL shortening via tinyurl, isgd and bitly!
<h3>Upgrading</h3>
<ol>
<li>Click update from the WordPress plugin menu.</li>
</ol>
or
<ol>
<li>Click ‘Download’ on this page.</li>
<li>Deactivate the twitcategory plugin through the Plugins menu in WordPress Admin.</li>
<li>Upload twitcategory.php to your /wp-content/plugins directory, overwriting the previous version.</li>
<li>Fill in your twitter account information (be sure to re-enter your password), using the twitcategory configuration menu found in WordPress Admin.</li>
</ol>

TwitCategory

Based on twitpress by Tom Purnell. Adds the ability to choose which category will result in updates to your twitter account.

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.

TwitCategory vs Click To Tweet