zaus

Exposes file upload/attachments to the regular service mapping of <a href="https://wordpress.org/plugins/forms-3rdparty-integration/" rel="ugc">Forms 3rdparty Integration</a>.
From discussion at https://github.com/zaus/forms-3rdparty-integration/issues/40.

Forms: 3rd-Party File Attachments

Add file upload processing to Forms 3rdparty Integration.

faisaliefr

Instant Contact lets you add a contact form to your WordPress blog. Simply load it into your plugins folder, activate it in your WordPress backend and place any shortcode / embedded code on the settings page you want the content / form to display on.
Compatible with:
<ul>
<li>Contact Form 7</li>
<li>Gravity Forms</li>
<li>Contact Coldform</li>
<li>Quick Contact Form</li>
<li>Responsive Contact Form</li>
<li>Simple Basic Contact Form and many more…</li>
<li>Any embedded code</li>
</ul>

Instant Contact – Generate leads and convert them into Customers

Instant Contact - supports all cf7, gravity forms, and form embedments...

Forms: 3rd-Party File Attachments vs Instant Contact – Generate leads and convert them into Customers