Thomas Schulte

This plugin dynamically shows preview screenshots of hyperlinks as tooltips on your WordPress site.
For the tooltip effect a jQuery plugin called “qTip2” is used internally. 
Find more about this great project here: http://qtip2.com/ 
The thumbnails are provided by http://thumbsniper.com and its API.

ThumbSniper

This plugin dynamically shows preview screenshots of hyperlinks as tooltips on your WordPress site.

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.

ThumbSniper vs Snap A Site