PeepSo
A full-featured social networking plugin for creating communities with WordPress.
PeepSo
Popups Premium
The easiest way to create a WordPress Popup
WP Timersys
WordPress to Buffer Pro
Automatically send content from WordPress to your Buffer account for scheduled publishing to Facebook, Twitter, Google+, LinkedIn and…
WP Cube
Revive Old Posts Pro
Revive Old Posts helps you automate sharing old (and new) posts on Facebook, Twitter, LinkedIn, Tumblr and Xing.
Themeisle
Yoast SEO
Extra features, more support!
Yoast