Robo

WP-Thumbnail is a simple and neat WordPress Plugin that not only allows you to use a short-code to generate dynamic 
screenshot of webpages in your posts but also takes a realtime snapshot of the served webpage and saves a link to it 
on the page itself that too without burdening the servers. This helps in optimizing search results on Google by adding 
a thumbnail to the left of the search result snippet and makes shared posts more attractive, with a relevant thumbnails, 
on Social Sites like Facebook.
For more information, check out <a href="http://wp-thumbnail.robocasters.com/" rel="nofollow ugc">wp-thumbnail.robocasters.com</a>.
Features include:
<ul>
<li>Short-Code – The plugin has a shortcode that enables you to add dynamic screenshots of webpages to your post.</li>
<li>Meta Thumbnail – It uses meta name thumbnail and adds the live screenshot in it for being displayed as a thumbnail in Google Searches.</li>
<li>PageMaps – PageMaps is a structured data format that provides Google with information about the data on a page. It enables website creators to embed data and notes in webpages.</li>
<li>Facebook OG:Image – It sets image with content og:image to the top priority for being used as a Facebook Post thumbnail.</li>
<li>WP-Thumbnail Class – It adds a WP-Thumbnail class that helps image to be used for all other sharing purposes.</li>
</ul>

WP-Thumbnail

'Changing the way you share', giving you an experience you have never had before...

Babar

Take a snapshot of a website and embed it on your blog post on the fly. No need any screen capture tools, no need any coding. 
Just insert the shortcode, and snapshot will be embed automatically on your post.
Here is an example: <code>[snap url=http://example.com alt="This snapshot has taken by Snap A Site"]</code>
For more details reffer to the User Manual part of the readme.txt file or find <a href="http://en.ibabar.com/snap-a-site#manual" title="Find the user manual of Snap A Site on my blog" rel="follow nofollow ugc">Snap A Site user manual</a>
Still searcing for something? Just drop a message @ <a href="http://en.ibabar.com" title="Use the contact form on my blog" rel="follow nofollow ugc">My Blog</a>
<h3>User Manual</h3>
It’s easy. Just insert this shortcode in your post: [snap url=http://example.com]
Supported parameters for [snap]
<ul>
<li>url – URL of the site to take snapshot</li>
<li>alt – For image alt</li>
<li>h – For imahe height</li>
<li>w – For image width</li>
<li>alt – For image alt</li>
<li>h – For imahe height</li>
<li>w – For image width</li>
<li>title -For link title</li>
<li>target – For link target</li>
<li>rel – For link rel</li>
<li>link – For linking to other site</li>
</ul>
Have further question? Let me know. Just drop a message @ <a href="http://en.ibabar.com" title="Use the contact form on my blog" rel="follow nofollow ugc">My Blog</a>

Snap A Site

The easiest way to take and embed snapshot of a site on Wordpress blog.

WP-Thumbnail vs Snap A Site