Bonny85

LB Users Counter is a plugin for WordPress. Allows you to add a widget to a sidebar, where you can view some attributes with respect to the number of users browsing the website (online, offline and online user name).
API Reference
User Class
This class contains the static methods for get info of users login
<ul>
<li>
User::getUserOff() This function get number of users offline.
</li>
<li>
User::getUserOn() This function get number of users online.
</li>
<li>
User::getNameUserOn() This function get the names of users online.
</li>
</ul>
<a href="http://www.lucabonaldo.it/lb-users-counter/" rel="nofollow ugc">Documentation in Italian</a>

LB Users Counter

Allows you to add a widget to a sidebar, where you can view some attributes with respect to the number of users browsing the website.

SandyRig

As the name suggests, it’s a very simple Hit Counter that counts the number of Unique Visitors and Page-views. It’s very light weight so it doesn’t strain your site or cause render blocking.
You can show either Unique Visitors count or Page-views count anywhere on the site using widgets or shortcode. You can also add/show both Counters by using two copies of the widget or the shortcode.
Note: It keeps counting even when you have no widget or shortcode active. To completely disable the counter you have to disable the plugin.
<h4>Features</h4>
<ul>
<li>AJAX based counter ignores most bots or crawlers</li>
<li>Monthly and weekly graph in admin</li>
<li>Show the Unique Visitors, Page-views count or both</li>
<li>Ability to reset the counter to any number any time</li>
<li>Can be shown anywhere on the site using Widgets and Shortcode</li>
<li>Counter works and shows data in admin even when no widget or short-code is active</li>
</ul>
<h4>SHORTCODES</h4>
[srs_total_visitors] for Unique Visitors 
[srs_total_pageViews] for Page-views
<a href="https://atif.rocks/srs-simple-hits-counter/" rel="nofollow ugc">DEMO</a>

SRS Simple Hits Counter

Simple plugin to count and show a total number of hits (Unique visitors or page-views) to the site without using any third party code.

LB Users Counter vs SRS Simple Hits Counter