Easy Digital Downloads EDD Social Discounts Addon
Ever wanted to offer your customers a discount for sharing or liking products on your website? This plugin does exactly that. It also allows you to share standard posts and pages, and products from a completely different post/page on your website. By turning off the discount functionality altogether, you can also use it as a simple sharing tool.

How it works
The plugin listens for events triggered by the various social networks. When it detects that a user has shared or liked your product, the discount is instantly applied, and a customizable thanks title and message is shown; all without the page refreshing.

By default, the sharing buttons will be shown automatically after the content on all your products. By using the included shortcode you can fine tune the placement on a per product basis, or even include the sharing buttons on posts and/or pages.