redcocker

<p>This plugin gets plugin’s download count and other stats from WordPress.ORG and allows you to show them on your blog using shortcode.</p>
<h4>Features</h4>
<ul>
<li>Easy and flexible.</li>
<li>Caching stats data.</li>
<li>Localization: English(Default), 日本語(Japanese, UTF-8).</li>
</ul>


Plugin Directory Stats

This plugin gets plugin's download count and other stats from WordPress.ORG and allows you to show them on your blog using shortcode.

Conner Tolley

<p>A simple plugin that will send a email stating the number of unique visitors the site has had in a certain time period.</p>


Visitor Mailer

Receive email of visitors on a daily or weekly basis, NO additional plugins or add-ons are required.

Plugin Directory Stats vs Visitor Mailer