This is the Shariff for WordPress plugin based on c't Shariff.
From the original Shariff GitHub project:
Shariff enables website users to share their favorite content without compromising their privacy.
Facebook, Google+ and Twitter supply official sharing code snippets which quietly siphon personal data from all page visitors. Shariff enables visitors to see how popular your page is on Facebook and share your content with others without needless data leaks.
Shariff
(/ˈʃɛɹɪf/)is an open-source, low-maintenance, high-privacy solution maintained by German computer magazine c't and heise online.
To get all dependencies, run ./init-sub.sh after getting the code. To create a WordPress plugin zip, run ./zip.sh after that.
Download it through your WordPress installation / wordpress.org or get the current .zip over here.