Name: Social Campaigns
Product info page: http://wordpress.org/extend/plugins/wishpond-social-campaigns/
Quickly and easily create promotions that spread quickly through all the major social networks: Facebook, Twitter, Pinterest, and Google+.
Wishpond Social Campaigns allows you to quickly and easily create and publish sweepstakes and limited-time special offers on your WordPress website. You can publish the campaigns as posts or pages, or within existing posts and pages using a simple short code. You can also publish them in the side bar of your WordPress site using simple widgets (if your theme supports widgets).