Reuven Karasik

This plugin alows you to display a message to all your visitors insode a fancy lightbox. 
features:
<ul>
<li>
Easy interface and simple settings pages
</li>
<li>
All features support any type of client-side code: HTML, Javascript, embed of video or enything you want
</li>
<li>
Display your message to all visitors in a pop-up lightbox. Automaticly put there a like button, and you will get lots of likes every week
</li>
</ul>

Your Lightbox

Display lightbox with your message or like button to all visitors

sgulloni

eddieconvert

claudiur

A/B testing for WordPress now possible and simple. 
It will enable your WordPress installation for use with the Convert Experiences conversion optimization suite.
The plugin will automatically send the several details, including, but not limited to: page type, page name, category name, category ID, and tags to Convert Experiences.
A/B testing on any set of categories or pages is then easy with the advanced filtering and segmentation during test 
configuration.
<blockquote>
You’ll need a <a href="http://www.convert.com/pricing/" rel="nofollow ugc">Convert Experiences account</a> to use this plugin. Once you have that, A/B tests are easy to 
 setup without any technical knowledge.
</blockquote>
<h4>What does the plugin do?</h4>
At a high level, this plugins sole purpose is to quickly install a small block of javascript onto each page of your 
WordPress installation. The installed javascript is necessary for the Convert Experiences suite to perform its 
A/B, split URL and multivariate functionality on your blog.
With some slight variations (based on the type of page being viewed: home, single, category, tag, or page), the 
inserted javascript will look like the following:
<pre><code>
<script type="text/javascript" src="//cdn-4.convertexperiments.com/v1/js/1111-4444.js?environment=production"></script>

</code></pre>

Convert Experiences

Convert Experiences provides advanced A/B and MVT Testing functionality for your website or blog.

Your Lightbox vs Convert Experiences