Joost de Valk

Easy contact form, embed it in a post or page by writing the shortcode [wpcf].
Features:
<ul>
<li>Spam protection.</li>
<li>Shows referrer information for the person contacting you.</li>
<li>Option for user to send himself a copy of the message.</li>
</ul>
More info:
<ul>
<li><a href="http://yoast.com/wordpress/enhanced-wordpress-contactform-plugin/" rel="nofollow ugc">Enhanced WordPress Contact Form</a>.</li>
<li>Read more about <a href="http://yoast.com/articles/wordpress-seo/" rel="nofollow ugc">WordPress SEO</a> so you can get the most out of this plugin.</li>
<li>Check out the other <a href="http://yoast.com/wordpress/" rel="nofollow ugc">WordPress plugins</a> by the same author.</li>
</ul>

Enhanced WP Contact Form

Easily add a contact form with spam protection to your pages, and get additional data about your visitors with each e-mail!

Tessa (they/them), AuRise Creative

sevenspark

Contact Form 7 – Dynamic Text Extension

With this great plugin, we were able to easily fulfil a customer's request for an extension. 
Thanks a lot

Great Plugin

Extends Contact Form 7 by adding dynamic form fields that accepts shortcodes to prepopulate form fields with default values and dynamic placeholders.

Enhanced WP Contact Form vs Contact Form 7 – Dynamic Text Extension