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.

Aaron D. Campbell

A widget that properly handles twitter feeds, including parsing @username, #hashtag, and URLs into links. It supports displaying profiles images, and even lets you control whether to display the time and date of a tweet or how log ago it happened (about 5 hours ago, etc).
<a href="http://aarondcampbell.com/wordpress-plugin/twitter-widget-pro/" rel="nofollow ugc">Twitter Widget Pro</a>

Twitter Widget Pro

A widget that properly handles twitter feeds, including parsing @username, #hashtags, and URLs into links.

Simple Twitter Widget vs Twitter Widget Pro