Fabian

Easy to use widget to insert customizable social media icons into one of your widget areas. The icons are defined by user, multiple widgets for different user accounts with different stylings are possible.
Customize colors, border-radius and size.

Social Profile Icons Widget

Displays highly customizable social media icons based on user profiles in a widget area.

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Nathan Rice

StudioPress

By simply dragging this widget into your sidebar or any widgetized area, you can easily place icon links to your various social profiles like twitter, facebook, flickr, etc.

Social Profiles Widget

This plugin/widget allows you to insert icon links to your social profiles in any widgetized area.

Social Profile Icons Widget vs Social Profiles Widget