This service allows your visitors to vote for your website. It is easy to integrate the service into your web pages. There is no own webspace needed. Where’s the difference? The difference to other voting services is that every user can vote. The users do not need an account to submit their votes.

WP Topvotes

This Plugin let the visitor vote your site via a simple widget like the facebook "I like this" button.

lienann

Add the possibility to use rating field in ACF.
Plug-in provide three calculation method for voting:
<ol>
<li>calculate by cookies (any visitor);</li>
<li>by IP (any visitor);</li>
<li>by user id (registered users only).</li>
</ol>
If “calculated by cookies” is selected, the only users which use browser with 
cookies enabled will be able to vote
In field settings you can also:
<ol>
<li>open|close vote;</li>
<li>tune the number of stars (1 to 20);</li>
<li>specify the method of re-voting – possible(period)|never</li>
</ol>
Use the_field($field_key, $post_id) or get_field($field_key, $post_id) function 
in page template for field output (see ACF documentation).
In admin panel the rating is inactive.
Attention! Before removing the plugin files read uninstall.php
Languages: English, Français, Русский
I apologize for possible mistakes in plugin translation. 
I will be glad to accept the help with the correct translation of a plugin into 
English and to correction of my mistakes.
<h4>Gratitudes:</h4>
Thanks to Ivan Shamshur for JS.
French Translation – thanks to Nicolas Kern.
<h4>Compatibility</h4>
This ACF field type is compatible with: ACF 4
For developers: https://github.com/lienann/acf-starrating

ACF: Star Rating Field

Hey,

The plugin is almost perfect!

The only thing that is missing is a function that returns the average voting results.

Can you add it please? :D

Thank you!

Cheers mi amigo!

The plugin is great, if you add something it'll be greater!

"Star rating" field. Add-on to Advanced Custom Fields plugin.

WP Topvotes vs ACF: Star Rating Field