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.

Tobias Zimpel

Many themes, as well as other plugins, provide shortcodes for layout options like multi-column-layouts, tabs, etc.
By default, Contact Form 7 forms can not include shortcodes provided by WordPress or third-party-plugins or -themes. 
It only processes its own shortcodes used to generate form elements.
This plugin enables the usage of external shortcodes inside Contact Form 7 Forms.

Contact Form 7 Shortcode Enabler

Resolve the problem perfectily. Congratulations!

great plugin

This plugin enables the usage of external shortcodes inside Contact Form 7 Forms.

Forms: 3rd-Party File Attachments vs Contact Form 7 Shortcode Enabler