natekinkead

This simple yet powerful plugin integrates with the bbPress forum plugin to add a new feature which allows users or visitors to vote up or down on topics and replies. Each topic and reply has a total score with an up arrow and a down arrow.
This plugin uses AJAX to save the vote on-the-fly without refreshing the page.
It’s also AMP compatible!
Visitors can only vote once on each topic or reply.
Features Included: 
* Show or hide (and customize) labels for up and down 
* Disable voting on topics or replies globally 
* Disable voting on specific forums 
* View-only score on closed topics 
* Sort topics and replies by voting scores 
* Admin bypass 
* GamiPress integration
Pro Features Available: 
* Historical weighted score visualization 
* Accepted answers 
* “Who voted” avatars 
* Sort dropdown 
* Sort on weighted score 
* Sort on trending score 
* Trending topics widget 
* Schema for Q&A rich snippets 
* Voting email notification to author 
* Mark topics or replies with poor scores as spam
Purchase bbPress Voting Pro at <a href="https://wpforthewin.com/product/bbpress-voting-pro/" rel="nofollow ugc">WP For The Win</a>!

bbPress Voting

I hope you enjoy this plugin!  If you have any questions, please post a topic in the for support forum.

Couldn't believe there was nothing out there like this!

Although I wish it had some options for placement. Not sure I like it above the author avatar.

Pretty cool

Let visitors vote up and down on bbPress topics and replies just like Reddit or Stack Overflow!

Scott Taylor

Most ratings plugins contain too much code: inline JavaScript, messy markup, weird CSS. Rate is simple, hardly intrusive, and completely overridable.
A Post/Page/Custom Post Type’s rating is the average of all comment ratings. A user can leave a rating when commenting, and change that rating inline after leaving a comment (if logged-in or Cookie’d).
Don’t be afraid to play around and extend the code: drop a <code>rate.css</code> file in your theme directory and mine won’t even load (by default, Rate stars are transparent with a white border, so you can use <code>background-color</code> to set your stars’ colors)!
<pre><code><?php 
// in this version, you need to insert these functions into your theme for ratings to appear
// you don't have to use the_rating(), the comment_rating() will work by itself, but the_rating() will not

// for a Post, Page, or Custom Post Type (average of all comment ratings)
the_rating();

// for a comment
the_comment_rating();
?>
</code></pre>
Read More: http://scottctaylor.wordpress.com/2010/11/30/new-plugin-rate/

Rate

Most ratings plugins contain too much code: inline JavaScript, messy markup, weird CSS. Rate is simple, hardly intrusive, and completely overridable.

bbPress Voting vs Rate