Mirco Babini

LinkedIn Perfect Share detects when LinkedIn is parsing/crawling the Open Graph tags of a post/page and provides a simplified version of the contents. This allows the scraper to see the correct sharing post’s data for the provided URL; the information includes the post title, the description and the Featured Image (that is the standard content for the WordPress’ og:image field).
Full description here: http://www.mircobabini.com/project/linkedin-perfect-share-plugin-for-wordpress/ 
Developed by Mirco Babini, WordPress Consultant, Web Developer and Data Lover.
<h4>Usage</h4>
It just works. You simply need to install and activate it.

LinkedIn Perfect Share

Provides precise Open Graph data to LinkedIn for perfect sharing

Rami Yushuvaev

nielsvanrenselaar

This plugin lets you set the Open Graph meta tags per post, page or custom post type and set default start values for new posts. It’s a simple plugin to get you started with the Open Graph meta tags and will get extended features soon.

Open Graph Metabox

Better!

This plugin lets you set the Open Graph meta tags per post, page or custom post type and set default start values for new posts.

LinkedIn Perfect Share vs Open Graph Metabox