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.

Creato

A simple WordPress Twitter feed widget and shortcode compatible with the new Twitter 1.1 API.
See http://tweetomatic.co.uk/docs/ for more information.

Tweetomatic Simple Twitter Feed

A simple Wordpress Twitter feed widget and shortcode compatible with the new Twitter 1.1 API.

Twitter Widget Pro vs Tweetomatic Simple Twitter Feed