Marco Buttarini

wg-twitter-widget is THE widget to show twitter status in wordpress sidebar. 
Developed starting from the existing widget of Sarah Isaacson, * using the example widget of Justin Tadlock

WG Twitter Widget

Twitter Widget Highly configurable, with image and last twit of users

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.

WG Twitter Widget vs Round Social Media Buttons