gregsaint

This shortcode plugin is used like so: 
[feedbackUnlockedLink href=”http://www.google.ca”]Google[/feedbackUnlockedLink]
The user must enter feedback into the rendered form and submit it before the link is 
made available.
Typical usage is a link to media content. User would provide feedback on a preview 
of the content before being able to download the media file.
Feedback is sent to server via AJAX and stored as a comment on the containing post.
The link is returned as a response to the submit request and displayed in place of 
the form.

Feedback Unlocked Download

This is a shortcode plugin that allows you to add a basic feedback form that users must fill out before they can access a link.

Jakob Lenfers

This addon adds buttons below your posts (or somewhere else) to make it easy to get reactions to the post, but without the hassle of writing a whole comment. It makes it easier for the reader to interact with you. The buttons are configurable (how many, what text, position) and simply are counters to how often they were clicked. There is also a widget and a shortcode to show the top x posts with the most clicks for each button.
The idea is inspired by a <a href="http://bloggerindraft.blogspot.com/2008/08/new-feature-reactions.html" rel="nofollow ugc">blogger feature</a> and since it’s been my first addon, I borrowed the structure from <a href="https://wordpress.org/extend/plugins/sociable/" rel="ugc">sociable</a>.
<h3>Restrictions</h3>
<ul>
<li>When using plugins to cache the pages, the buttons won’t be up to date. They will increment through the javascript, but when the page reloads the old count will show again, until the cache is deleted. Check the FAQ on possibilities how to change that.</li>
</ul>

Reaction Buttons

Adds buttons for very simple and fast feedback to your post. Inspired by Blogger.

Feedback Unlocked Download vs Reaction Buttons