Martin Lormes

Automagically adds Open Graph tags to your blog. Control how your posts and pages are presented on Facebook and other social media sites. No configuration needed.
When someone likes or shares your blog on Facebook, your header image is shown. If someone likes or shares a post, the featured image (post thumbnail) is shown. If you haven’t selected a featured image, then the plugin looks for the first image inside the post. If there aren’t any images in your post, then your blog’s header image is shown.
For more information on the Open Graph protocol go to http://ogp.me/

Open Graph Pro

Adds Open Graph tags to your blog. Control how your posts and pages are presented on Facebook and other social media sites. No configuration needed.

Alexander

Open Graph Headers for WP plugin adds opengraph meta tags to head of all pages on your WordPress site. 
It does not add any page on admin part. There is no any features the plugin takes all data from posts and pages. 
The tags generated with this plugin are prepared with requires of published Opengraph standards (http://ogp.me/).

Open Graph Headers for WP

This plugin allows you to add open graph meta tags to your WordPress website.

Open Graph Pro vs Open Graph Headers for WP