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.

solomon_s_scott

This plugin creates a responsive widget that displays up to eight different social media websites. (Not all 8 are required)
<ol>
<li>Facebook</li>
<li>Twitter</li>
<li>Google+</li>
<li>YouTube</li>
<li>LinkedIn</li>
<li>Instagram</li>
<li>Pinterest</li>
<li>Tumblr</li>
</ol>

Round Social Media Buttons

Provides a responsive social media widget that displays up to eight different social media websites.

Proper Twitter Widget vs Round Social Media Buttons