AutomatorWP WP Fluent Forms Addon GPL Overview:
WP Fluent Forms is a free form-builder plugin that allows you to easily build advanced forms for your WordPress-powered website.
User submits a form
FREEGuest submits a form
PROUser submits a field value on a form
PROGuest submits a field value on a form
Field value tag to use any form field submitted value on actions.