Garth Gutenberg

Lets you display a twitter feed in a sidebar widget. 
Caches last successful tweet retrieval and only updates if it successfully gets a new list from Twitter. 
Practically every element has a unique class so that it’s highly customizable via CSS.
There are various configuration options including:
<ul>
<li>Title</li>
<li>Twitter Username</li>
<li>Max Tweets to Display</li>
<li>HTML to override the View All link</li>
<li>Time Placement (whether or not the timestamp should appear before or after the tweet)</li>
<li>Time Format (uses PHP’s date() function for formatting)</li>
</ul>

GG Twitter

Prasanna SP

silverks

Twiget Twitter Widget lets you display your latest twitter status updates in any of the widgetized areas. Just add the Twiget Twitter Widget to your sidebar or any of the widget areas and enter your twitter username. It will display your latest tweets along with a follow @username button to make it easier for people to follow you! You can configure widget title, twitter username, number of tweets to display, link target etc, in the widget configuration.
Features:
<ul>
<li>Twitter API 1.1 support</li>
<li>Twitter requests caching with auto-optimised duration for performance</li>
<li>AJAX-based so your site’s load time is not affected by Twitter’s server</li>
<li>Multiple instances of widget</li>
<li>Option to change widget title</li>
<li>Option to change number of tweets to display</li>
<li>Option to show followers count, profile picture, and Twitter bio</li>
<li>Option to show twitter client used. Eg: via Twitter for Android</li>
<li>Option to open links in a new window</li>
<li>Option to hide @replies</li>
<li>Linkified @usernames and #hashtags</li>
</ul>
Twiget is developed by <a href="http://www.khairul-syahir.com/" rel="nofollow ugc">Syahir Hakim</a> of <a href="http://www.graphene-theme.com/" rel="nofollow ugc">Graphene Theme</a> and <a href="http://www.prasannasp.net/" rel="nofollow ugc">Prasanna SP</a>.
Translation: If you want to translate this plugin to your language, please find the twiget.pot file in /languages/ folder.
Demo: See demo of this plugin <a href="http://demo.prasannasp.net/" rel="nofollow ugc">here</a>. It is the second item in the sidebar.
Support: Please post your support questions at Twiget Twitter Widget plugin <a href="http://forum.prasannasp.net/forum/plugin-support/twiget/" rel="nofollow ugc">support forum</a>.
Visit <a href="http://www.prasannasp.net/wordpress-plugins/" rel="nofollow ugc">this page</a> for more WordPress Plugins by the developer.
This plugin uses Abraham’s [twitteroauth library] (https://github.com/abraham/twitteroauth‎/).

Twiget Twitter Widget

A widget to display the latest Twitter status updates.

GG Twitter vs Twiget Twitter Widget