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.

Valeriu Tihai

The Twitter Follow button is a small widget which allows users to easily follow a Twitter account from any blog.
You can configure the Twitter Follow Button:
<ul>
<li>“User to follow” set a user to follow;</li>
<li>“Followers count display” You can enable the display the number of followers;</li>
<li>“Language” specify the language for the Follow Button, available in English (en), French (fr), German (de), Italian (it), Spanish (es), Korean (ko), Japanese (ja), Russian (ru) and Turkish (tr);</li>
<li>“Button Size” The size of the button can render in either “medium”, which is the default size, or in “large” – which is the larger button.</li>
<li>“Show Screen Name” The user’s screen name shows up by default, but you can opt not to show the screen name in the button.</li>
<li>“Opt-out of tailoring Twitter” Twitter buttons on your site can help us tailor content and suggestions for Twitter users.</li>
</ul>

Twitter Follow Button

Add the Twitter Follow Button to your blog to increase engagement and create a lasting connection with your audience.

TwitCategory vs Twitter Follow Button