URLCapt

URLCapt is a free online service which create a screenshot of a given webpage the result can be downloaded as png, jpeg or pdf.

More info at http://urlcapt.com/page/FAQ

Icon: 
Code:
$links['urlcapt'] = array( 'name' => 'URLCapt', 'description' => t('Create a snapshot with URLCapt'), 'link' => 'http://urlcapt.com/?url=<raw-encoded-url>', );
Example:
Add to ListOptions