ChromaDot

Chroma Google Analytics is a plugin for adding Google Analytics tracking to your website. Input your Tracking ID into the plugin settings page in your admin area and visitors will start being tracked.
A Google Analytics account is required. Go to <a href="https://analytics.google.com" rel="nofollow ugc">analytics.google.com</a> to sign up.
<h3>Features</h3>
<ul>
<li>Uses the latest Google Analytics Universal code</li>
<li>Allows specific user roles to be excluded from tracking</li>
<li>The tracking code can either be run in the page head or after the page loads</li>
<li>Localhost environments can be excluded from tracking</li>
</ul>

Chroma Google Analytics

A simple plugin for adding Google Analytics tracking to your website

Jandal

Quantcast Quantifier adds the necessary JavaScript code to enable Quantcast logging on any WordPress blog. This eliminates the need to edit your template code to begin logging.
http://www.jamesturner.co.nz/other/wordpress/plugin-quantcast-quantifier/
Features
Quantcast Quantifier Has the Following Features:
<ul>
<li>Inserts tracking code on all pages WordPress manages.</li>
<li>Easy install: only need to know your Quantcast tag.</li>
<li>Option to disable tracking of WordPress administrators.</li>
<li>Can include tracking code in the header or footer, speeding up load times.</li>
<li>Complete control over options; disable any feature if needed.</li>
</ul>
Usage
In your WordPress administration page go to Options > Quantcast Quantifier. From there enter your Quantcast tag and enable logging. Information on how to obtain your Quantcast tag can be found on the options page.
Once you save your settings the JavaScript code should now be appearing on all of your WordPress pages.

Quantcast Quantifier

Allows you to easily add the necessary JavaScript code to enable Quantcast on your blog.

Chroma Google Analytics vs Quantcast Quantifier