Budiony Damyanov

Counts the visits from web spiders, crawlers and bots in your blog, with ability to get the blog rankings from Google or Alexa. 
Also can count any other visit, the plug-in is looking for patterns in user-agent string, which pattern can be customized. 
You can block or unblock crawler, spider (or any other item), by IP address and identifier via .htaccess file. 
As additional information you can get your blog rankings from Google PageRank or Alexa.

bodi0`s Bots visits counter

Counts the visits from web spiders, crawlers and bots in your blog, with ability to get the blog rankings.

Claudio Simeone

Most Read Posts counts Post and Pages hits and allows you to show them in:
<ul>
<li>The Single Post page</li>
<li>The Page page</li>
<li>Index and Archive pages</li>
<li>The Sidebar through a configurable Widget, also with featured images</li>
</ul>

Most Read Posts in XX days

A simple plugin that counts and shows hits for each Post and Page in your WordPress blog.

bodi0`s Bots visits counter vs Most Read Posts in XX days