stephan.gerlach

csAlexa adds the meta tag in order to claim ownership of a site for http://www.alexa.com.
Simply get the verification code and save it in the options screen and you are done.

csAlexa

Automatically adds the meta tag to claim ownership of a site for Alexa

fynsnap

A plugin to integrate the Feedback Widget into WordPress websites. Allows configuration for “All Visitors” or “Members Only.”
<h3>Use of third party services</h3>
This plugin uses services of Fynsnap feedback application (https://fynsnap.com/). 
So you may need to register on their website for free or paid whatever plans they have in their website. 
Their plans may have change so check them and use this plugin if you have any valid active plan from them.
This service is provided by “Fynsnap”: <a href="https://fynsnap.com/refund_returns/" rel="nofollow ugc">terms of use</a>, <a href="https://fynsnap.com/privacy-policy/" rel="nofollow ugc">privacy policy</a>.

FynSnap Feedback

Easily integrate the FynSnap Feedback Widget into your WordPress site. Customize visibility for all visitors or members only.

csAlexa vs FynSnap Feedback