Henry Wright

Here makes use of the WordPress Transients API to keep a record of who’s currently online. A green dot will appear next to each active user.

Here

See who's online now on your WordPress site.

wpgear

A simple, easy, fast, adaptive, local, objective counter to visit your site. 
It does not use any additional requests to other servers, which means it consumes minimal resources. 
Displays the count of all views of any page as a number. 
You can customize your own display style. Use class: ‘wpgear_counter_hits’
Just paste Shortcode [Get_Counter_Hits] wherever you like and that’s it. 
Or you can use calls in PHP scripts code: echo get_Counter_Hits ();
<h4>Features</h4>
<ul>
<li>Simple local Counter.</li>
<li>It always works, even if the result is not displayed anywhere.</li>
<li>
Doesn’t count if Admin Page.
</li>
<li>
ShortCode for use: [Get_Counter_Hits]
</li>
<li>ShortCode for use with correction +100000: [Get_Counter_Hits base=”100000″]</li>
<li>
PHP use: echo get_Counter_Hits ($base);
</li>
<li>
CSS Class ‘wpgear_counter_hits’ – for disign customisation.
</li>
</ul>
<h4>Demo</h4>
<a></a>You can see the Demo here

Counter-Hits

A simple, easy, fast, adaptive, local, objective counter to visit your site.

Here vs Counter-Hits