neatek

This plugin make authorization
<h3>Privacy</h3>
We are using 3rd party service called “ClickLogin” – https://clicklogin.ru/, 
anyone can use that for creating authorization via social pages. 
Read <a href="https://clicklogin.ru/policy" title="Privacy policy" rel="nofollow ugc">Privacy policy</a>.

Click Login One-Click Auth

Emanuela Castorina

This plugin in a multisite installation shows the ID of the current site/blog in the admin bar menu. The ID of the current site/blog is linked to the site info page. 
It adds also a custom column with site id information inside the sites list table. 
It can be installed only on a multisite.

Wp Show Site ID

This plugin in a multisite installation shows the ID of the current site/blog.

Click Login One-Click Auth vs Wp Show Site ID