artesea

Allows simple integration between your sidebar widgets and the official twitter widget 
** THIS WIDGET WILL STOP WORKING AFTER MAY 7TH 2013 ** 
This is when Twitter stop unauthenticated calls to their API, and block the old 
widgets. https://dev.twitter.com/blog/api-v1-retirement-final-dates 
This plugin won’t support the new Twitter Widget. 
For more information about them please visit: https://twitter.com/settings/widgets

(Un)offical Twitter Widget

Allows simple integration between your sidebar widgets and the official twitter widget ** THIS WIDGET WILL STOP WORKING AFTER MAY 7TH 2013 **

chipsandtv

This widget lets you display your latest tweets on your blog. Various configuration options are available.
Features:
<ul>
<li>No need to enter your Twitter password</li>
<li>No Javascript</li>
<li>Simple but reliable caching, so your website won’t slow down</li>
<li>Various options such as clickable URLs and usernames, date format etc.</li>
<li>Supports multiple instances at the same time</li>
<li>Fully compatible with widget-ready themes</li>
</ul>

Simple Twitter Widget

A simple but powerful widget to display updates from a Twitter feed. Configurable and reliable.

(Un)offical Twitter Widget vs Simple Twitter Widget