mihai-rotaru

Simple plugin which wraps a Twitter widget as a WordPress widget.
In order to use it, you need the Twitter widget’s ID – something like 
332108549298064896. You can see it in the embeddable code Twitter gives you 
after you create the widget. You also need the Twitter username for the account 
the widget belongs to.

Proper Twitter Widget

Makes available a widget which contains a Twitter feed.

mclarty

Twitter Hashtag Feed Widget creates a simple, clean Twitter feed of a specified hashtag. This widget is specifically designed to render a lightweight widget that can be completely styled by the user through CSS.
<h3>Custom Theming</h3>
All widgets have the CSS class .widget_twitter_hashtag_feed_widget for uniform styling across all widgets on the site.

Twitter Hashtag Feed Widget

A sidebar widget that creates a simple, clean Twitter feed of a specified hashtag.

Proper Twitter Widget vs Twitter Hashtag Feed Widget