elightbo

This twitter plugin outputs your twitter updates to your WordPress blog. It linkifies hash tags and @replies while properly caching. It is called TweetiePie because it uses the <a href="https://wordpress.org/extend/plugins/simplepie-plugin-for-wordpress/" title="SimplePie" rel="ugc">SimplePie WordPress plugin</a> to pull the tweets from twitter and cache them. Caching is necessary to minimize the times that your blog has to talk to twitter. This will speed up your site and <a href="http://apiwiki.twitter.com/Rate-limiting" title="Rate limiting on twitter" rel="nofollow ugc">keep twitter happy</a>.
This plugin requires WordPress 2.8 or greater. If using an earlier 2.8 version it also requires the <a href="https://wordpress.org/extend/plugins/simplepie-plugin-for-wordpress/" title="SimplePie" rel="ugc">SimplePie WordPress plugin</a>.

TweetiePie

Outputs latest twitter updates and linkifies hash tags and @replies.  Properly caches.

H. Peter Pfeufer

This Plugin will add a twitter timelina as a sidebarwidget to your wordpress-blog. This timeline is provided by twitter as you can see <a href="http://twitter.com/about/resources/widgets/widget_profile" rel="nofollow ugc">here</a>. 
Now you dont need to copy and paste the code from twitter with your settings anymore, just install the plugin and set the options.
Features
<ul>
<li>Easy install</li>
<li>Panel for easy configuration</li>
<li>Customisation via CSS in settings</li>
</ul>
Available Languages
<ul>
<li>English</li>
<li>German</li>
</ul>

WP Twitter Timeline

Add a sidebarwidget with your twitter timeline to your WordPress-Blog.

TweetiePie vs WP Twitter Timeline