Marco Buttarini

wg-twitter-widget is THE widget to show twitter status in wordpress sidebar. 
Developed starting from the existing widget of Sarah Isaacson, * using the example widget of Justin Tadlock

WG Twitter Widget

Twitter Widget Highly configurable, with image and last twit of users

topdevs.net

Illia

Just like timelines on twitter.com, Simple Twitter Plugin widget are interactive and enable your visitors to reply, Retweet, and favorite Tweets directly from your sidebar. Users can expand Tweets to see Cards inline, as well as Retweet and favorite counts. An integrated Tweet box encourages users to respond or start new conversations, and the option to auto-expand media brings photos front and center.
Mobile Support
<ol>
<li>Works on major smartphone browsers.</li>
<li>Interface is adaptive for touch (e.g. actions will always be visible, and spacing adjusted.)</li>
<li>Graphics optimized for Retina and other high-density displays.</li>
<li>Uses web intents for interaction, which also are designed adaptively for mobile.</li>
</ol>
Please visit <a href="http://plugins.topdevs.net/simple-twitter-plugin/" title="Simple Twitter Plugin Home Page" rel="nofollow ugc">Plugin Home Page</a> for more info and examples.
Visit our <a href="http://codecanyon.net/user/topdevs/portfolio?ref=topdevs" title="Our CodeCanyon Portfolio" rel="nofollow ugc">CodeCanyon Portfolio</a> to see more awesome plugins we made.

Simple Twitter Plugin

Display timeline for Tweets from an individual user, a user’s favorites, Twitter lists, or any search query or hashtag as a widget in your sidebar.

WG Twitter Widget vs Simple Twitter Plugin