DefProc

TweetUpdater will send a message to your Twitter account, from you WordPress installation, whenever a new post is published, or when a previously published 
post is updated; as you choose.
The tweet format is flexible, with placeholders for title and URL. URLs can be included from a variety of sources. In addition to full 
post permalinks (standard or friendly urls as selected in your site setup) the following short url services are supported:
Internal services:
<ul>
<li><a href="https://wordpress.org/extend/plugins/le-petite-url/" rel="ugc">la petite url</a> plugin</li>
<li>WordPress Permalink</li>
</ul>
Generic shorteners
<ul>
<li>YOURLS</li>
</ul>
External services:
<ul>
<li>Bit.ly</li>
<li>Stwnsh</li>
<li>TinyURL</li>
</ul>
Posts tweeting can be ommited based on post category, or custom field, or custom field and value pair.
Derived from the original TwitterUpdater, version 3 has been fully rewritten to include OAuth authorisation with Twitter; because basic 
authentication (username & password) has now been deactivated for applications using the Twitter API.
The TwitterUpdater plugin has a great tradition of being updated and improved by anyone who needed it to do something different, and 
as such TweetUpdater is one of a handful of TwitterUpdater forks.
If the short url service you like to use is not included, please see the FAQ on how to add it. If you add a service, let me know and 
I’ll add the code to the next release.
<ul>
<li>Support & Bug reports at <a href="http://github.com/DefProc/TweetUpdater/issues" rel="nofollow ugc">github.com/DefProc/TweetUpdater/issues</a></li>
</ul>

TweetUpdater

Send messages to Twitter when a post is published or updated; uses OAuth. Will add a short URL from a plugin, or from an external service.

Jason

For all you fellow tweeple, this is the plugin for you. Sure, there are tons of Twitter WordPress plugins already out there, but Tweeple gives you a more <a href="http://themeblvd.com" rel="nofollow ugc">ThemeBlvd</a>-ish approach to things.
Note: This plugin does NOT require a theme with Theme Blvd framework. This is a plugin for all tweeple!
<h4>How it works</h4>
Authentication: After setting up your credentials with Twitter API — <a href="https://wordpress.org/plugins/tweeple/faq/" rel="ugc">see FAQ</a> — you can utilize Tweeple to pull from Twitter API for your WordPress website.
Twitter Feeds: You can setup as many Twitter Feeds on your site as you want, and manage them all from one location at WP Admin > Tools > Tweeple. A Twitter feed can be configured to pull a Twitter user’s public timeline, public list, favorite tweets, or a custom search term, phrase, or hashtag.
Implementation: You can display any of your Twitter feeds on your website via the “Tweeple Twitter Feed” widget or the <code>[tweeple_feed]</code> shortcode. — <a href="https://wordpress.org/plugins/tweeple/installation/" rel="ugc">See Usage Instructions</a>.
<h4>Contributing</h4>
Tweeple is a free plugin for everyone. If you find bugs, or have suggestions, please don’t hesitate to post in our official Tweeple repo on Github.
<a href="https://github.com/themeblvd/Tweeple" rel="nofollow ugc">https://github.com/themeblvd/Tweeple</a>
<h4>A note to Theme Blvd customers</h4>
If you’re currently using a Theme Blvd theme, you probably noticed that the Theme Blvd Twitter widget included no longer works, as of June 2013, because of changes to Twitter’s API system. We apologize for this inconvenience.
If you’d like to keep our Twitter functionality, you’ll want to use this plugin as a replacement. Using this plugin’s “Tweeple Twitter Feed” widget with your current Theme Blvd theme should give you an almost identical result on the frontend of your website as the old widget gave you.
Note: As future theme updates come out, you will see that we’ve moved much of the theme’s functionality like <a href="https://wordpress.org/plugins/theme-blvd-layout-builder/" rel="ugc">custom layouts</a>, <a href="https://wordpress.org/plugins/theme-blvd-sliders/" rel="ugc">sliders</a>, <a href="https://wordpress.org/plugins/theme-blvd-shortcodes/" rel="ugc">shortcodes</a>, <a href="https://wordpress.org/plugins/theme-blvd-widget-pack/" rel="ugc">widgets</a>, etc, to plugins, and the Twitter functionality is no different. So Tweeple will hopefully be your answer, moving forward, as we roll things along.
<h4>Credits</h4>
<ul>
<li><a href="https://github.com/themattharris/tmhOAuth" rel="nofollow ugc">tmhOAuth</a>, An OAuth 1.0A library written in PHP. By <a href="https://twitter.com/themattharris" rel="nofollow ugc">Matt Harris</a>.</li>
</ul>

Tweeple

Setup Twitter feeds to pull a user's public timeline, public list, favorite tweets, or a custom search term, phrase, or hashtag.

TweetUpdater vs Tweeple