Dave Ligthart

Import users from vcard as subscribers. 
Works with populair websites such as linkedin and gmail.
Notable features:
<ol>
<li>Import users from vcards as subscribers to your website.</li>
<li>Import user contact data from populair websites such as linkedin and gmail.</li>
</ol>

WP-vCard

Import users from vcard file format. Works with populair websites such as linkedin and gmail.

perschmitz

Responsive, highly visible contact call-to-action that sits on top of your website. Combining instant-contact buttons, vCard import, location, business hours, messaging and more. Easily add your HelloBox to your WordPress site with the official HelloBox for WordPress plugin.
<h4>Features</h4>
<ul>
<li>Personalize look & feel to suit your needs</li>
<li>People can easily download your contact details</li>
<li>Business hours, including open/closed indicator</li>
<li>Contact form</li>
<li>Location</li>
<li>Phone & mobile tap-to-call, Skype integration</li>
<li>Messenger intergration</li>
<li>Responsive design (optimized for mobile, tablet & desktop)</li>
<li>Call-to-action triggers (on scroll, on exit-intent, time-based)</li>
</ul>
The HelloBox for WordPress plugin is a really simple plugin that allows you to copy and paste your HelloBox code snippet from <a href="http://www.gethellobox.com/" rel="nofollow ugc">getHelloBox.com</a>, straight to your WordPress admin interface.
Requirements: PHP5+, WordPress 2.9.x+
Important Links:
<ul>
<li><a href="http://www.gethellobox.com/" rel="nofollow ugc">getHelloBox.com</a></li>
</ul>

HelloBox

Responsive, highly visible contact call-to-action. Combining instant-contact buttons, vCard import, location, business hours, messaging and more.

WP-vCard vs HelloBox