hostinginfo360

This plugin will collect Google Page Rank and Alexa Rank and display it in the footer of your blog. 
The result will be collected 1 time each day.
This release is compatible with all WordPress versions since 3.0.
<h3>License</h3>
Good news, this plugin is free for everyone! Since it’s released under the GPL, you can use it free of charge on your personal or commercial blog.

Web Rank Get

This plugin will collect Google Page Rank and Alexa Rank and display it in the footer of your blog.

Junglee

Information will be related to
1) Google indexed pages 
2) google inbound links 
3) Alexa rank 
4) Alexa inbound links, 
5) DMOZ listings, 
6) Siteadvisor rating, 
7) WOZ rating, 
8) Domain age.
Visit solarwebtraffic.com/content to get free wordpress autoblog

Domain Report

This plugin provide info related to your domain such as inbound links, rank, advisor rating etc..

Web Rank Get vs Domain Report