shonert

This plugin provides a simple contact form including shortcode, basic form fields, spam prevention, and customizer settings.
<ul>
<li>Name</li>
<li>E-mail</li>
<li>E-mail validation</li>
<li>Message</li>
<li>Phone (optional)</li>
<li>Address (optional)</li>
<li>Pre-defined message text</li>
<li>Multiple recipients</li>
<li>HTML5 form field validation</li>
<li>Success Message (customizer)</li>
<li>E-mail signature (customizer)</li>
<li>Auto-reply text (customizer)</li>
<li>Token preventing multiple submits (customizer)</li>
<li>Security number field (customizer)</li>
<li>GDPR checkbox (customizer)</li>
<li>Translations: EN, DE</li>
</ul>

mnmlWP Simple Contact Form

This plugin provides a simple contact form including shortcode, basic form fields, spam prevention, and customizer settings.

Hackbard23

You are using the Contact Forms 7 Plugin and are angy about the none HTML 5 Support? 
No Problem. With this Plugin u will have the normal Datepicker & Number Spinner from jQuery in your Internet Explorers and other none HTML5 browsers.
If you have Questions or Feature Request, feel free and contact me.

Contact Form 7 IE DatePicker and Number Spinner Fix

Still works on actual WP 4.7.3. but the need to hack the date format in plugin it self makes it bit awkward.

missing set date format

Works like a charm!

Add the jQuery Datepicker and Spinner functionality to your Contact Form 7

mnmlWP Simple Contact Form vs Contact Form 7 IE DatePicker and Number Spinner Fix