Allow users to create an account and sign in to your site with Facebook, adds your posts/pages to the Facebook Open Graph, and makes the new Facebook
Just install flodjiShare to enable Social Sharing and SEO-Features on your WordPress site. This Plugin is also compatible to Multi-Author Blogs.
Onebox: A Fancy Hyperlink Display Plugin for WordPress
Adds automatically Open Graph metatags based on the title, content and thumbnail of the post. Install and activate, and you are done!
Customise the way your post/page will be displayed on the major social media through the Open Graph Protocal (OGP).
Embed the XING Share Button and the Follow Button on your WordPress website without any hassle.
Add social meta for pages in header without coding.
Craft the appearance of your site when your visitors share it on Facebook
Adds the Facebook OpenGraph meta tags and the Google+ link rel/publisher meta.
Enable facebook comment/like button individually for each post or for all posts and send notifications by e-mail, have a Widget and show Opengraph met
A very simple SEO plugin
Create beautiful Facebook Share Images! We create screenshots of your Articles and Pages and use these as Facebook's Share Image
Adds essential Open Graph information to your WordPress header.
Adds Twitter Card's Open Graph meta tags to your WordPress header
Adds Facebook specific Open Graph meta tags to your WordPress header
Adds personalised Open Graph tags that Facebook proposed, and constantly change their mind about supporting.
The JotLinks Like Button adds a 'Like' button to your WordPress blog posts.
Add OpenGraph header to support better Facebook and Google Plus sharing.
The Gunner Technology OpenGrapher plugin allows WordPress admins to configure OpenGraph info for their site and add official badges with tracking.