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.

clicktotweet

Click to Tweet: The #1 WordPress Plugin for Twitter
Click to Tweet is the easiest way to promote your content and encourage your audience to share it on Twitter through active prompts and optimal usability.
So how does it work? After installation and activation, bloggers and content managers can create click to tweet text or image boxes comprised of relevant excerpts from a blog post or page. Because the plugin accommodates a myriad of styles, if there’s new or revised content to disperse, Click to Tweet can facilitate it via highly customizable displays and themed templates.
Click to Tweet is the professional, noninvasive way to ask subscribers and visitors to share content while giving them a single-click pathway to completion. If you want your content to be shared, you absolutely must make it easy.
Click to Tweet is successful because of its simple, effective promotion that adheres to the character count parameters of Twitter. You can also include Twitter usernames automatically to increase social media followers even more!
Plugin Features
<ul>
<li>Both the app and plugin are free to install and include five full-featured links with an automatic URL shortening service, full scale tracking including location, and analytics to monitor site traffic and overall engagement.</li>
<li>Upgrades to unlimited plans are available for an affordable cost of $4.97 per month for Pro and $49.70 per year for Expert (receive 2 months free). Both membership options include unlimited links.</li>
<li>Link tracking allows users to take advantage of automatic link shortening and statistics of each embedded link. Click tracking provides detailed analytics on the Click to Tweet link such as total number, date, and location of clicks.</li>
<li>Click to Tweet links are automatically embedded and fully editable. Links can be categorized using folders by topic, date range, etc. for quick reference.</li>
<li>Lots of themes to choose from to really make your tweetable links stand out! Fully customize the display box that appears including colors, text, images, and more.</li>
</ul>
For more information, support, or to download the desktop app, visit http://clicktotweet.com.

Click To Tweet

Easily design and insert "click to tweet" boxes in your blog posts that make it easy for your readers to tweet your content, images and link …

TwitCategory vs Click To Tweet