H. Peter Pfeufer

This plugins installs a sidebar widget to show you social profile-icons.
Features
<ul>
<li>Easy install</li>
<li>Panel for easy configuration</li>
<li>Sveral Icon Sets available</li>
</ul>
Languages
<ul>
<li>German</li>
<li>English</li>
<li>Serbo-Croatian</li>
</ul>

Social Profiles Sidebar Widget

Add a sidebarwidget for social profiles in you blog. Supports several sets of icons and three different iconsizes. 32, 64, and 128 Pixel.

aitor.delapuente

This plugin helps ensure your content has a relevant thumbnail when shared on social sites.
Adds an image_src and og:image meta tags to your header using post thumbnnail (you must have post thumbnails / featured image enabled), first image on post/page content, or a defined default image.

FetenWeb image_src Metatag

This plugin helps ensure your content has a relevant thumbnail when shared on social sites.

Social Profiles Sidebar Widget vs FetenWeb image_src Metatag