Sam Hotchkiss

This plugin was built by the Maine WordPress Meetup group to make it really easy to add social network icons to your posts.
<h3>This plugin supports the following social networks:</h3>
<ul>
<li>Facebook</li>
<li>Twitter</li>
<li>LinkedIn</li>
<li>StumbleUpon</li>
<li>Delicious</li>
<li>Digg</li>
<li>Reddit</li>
<li>Designfloat</li>
</ul>
You can set this to display at the top or bottom of posts, or display it through a template tag:
<pre><code> socnet_display_links($post_id); 
</code></pre>
Note that the post_id is optional, it will default to the current post.

Simple Socnets

This plugin was built by the Maine WordPress Meetup group to make it really easy to add social network icons to your posts.

soychuy

YouTube Thumbnail to Featured Image, as its name says, is a plugin that helps you to set a YouTube video thumbnail as a featured image of a post. The user just have to set a YouTube video URL and the plugin will do the rest.
The video thumbnail will be imported to your media library, so you can use it anywhere else.

Youtube Thumbnail as Featured Image

Use a YouTube Thumbnail as a Featured Image for a WordPress Post. You only have to set a YouTue Video URL and the plugin does the rest.

Simple Socnets vs Youtube Thumbnail as Featured Image