Ron Rennick

Rolf Allard van Hagen

Adds a Theme Stats option to the super admin menu. The admin panel lists all the themes in use site-wide. At the top of the list will be the most popular theme and a number in brackets of how many are in use. Click on the name, and a drop-down list will appear of all blogs using that theme, with a link to each blog’s home and dashboard.
This plugin goes in the mu-plugins folder. This is an updated version of the theme stats (for subdomain installs) plugin we released in 2007. This version is designed for either subdomain or subdirectory installs.

Multisite Theme Statistics

Adds theme usage statistics within your network, shows themes by user and most popular themes.

yanniks

This is the Shariff for WordPress plugin based on c’t Shariff.
For more information, check out the original <a href="https://github.com/heiseonline/shariff" rel="nofollow ugc">GitHub project</a> and the <a href="http://ct.de/shariff" rel="nofollow ugc">c’t information page</a>.
<blockquote>
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 <code>(/ˈʃɛɹɪf/)</code> is an open-source, low-maintenance, high-privacy solution maintained by German computer magazine c’t and heise online.
</blockquote>
Shariff supports sharing buttons for Facebook, Twitter, Google+, LinkedIn, Pinterest, Reddit, StumbleUpon, XING, WhatsApp and mail. 
Select which color you want, set the button location, select the orientation fitting most to your website and set the TTL just as you want.

Shariff for WordPress

Shariff enables website users to share their favorite content without compromising their privacy.

Multisite Theme Statistics vs Shariff for WordPress