by Aaron Reimann on WordPress.org
A widget that uses jQuery and Twitter to display a user's tweets (or can just list the updates). Works with the Twitter API 1.1

The admin section showing the Widget
A Widget that uses jQuery (if you want) and Twitter to fade in and display a user’s tweets one at a time, then fades into the next. You can set the amount of tweets and how long they stay before they fade into the next tweet. The tweets are in an infinite loop. It only uses the jQuery library that comes with WP. It is simple, but if you know CSS you can make it look very very nice.
You now have to go to Twitter’s Dev Section and create an “app”. Please don’t be terrified by this. It takes 5 minutes. The hardest part is copying and pasting the keys once they are created 🙂
Your server must have cURL enabled, it is required by the Twitter OAuth library (Thanks goes out to https://github.com/abraham/twitteroauth)