Contact Form by Supsystic is a free, simple and powerful Contact Form Builder with drag-and-drop editor. No coding knowledge is required. There is a Pro paid for version with added features.
Main features:
Drag-and-Drop Contact Form Builder
Professional, responsive built-in Form templates design
Google reCaptcha
Unlimited Fields and Forms
Publish Content
Embed Popup Forms
Quiz, Registration, Subscription form
File Upload Form
Conditional Logic
Contact Form A/B Testing
Statistics
Contact Form widget
Multi language support
Fully responsive and mobile-friendly
Integration with Popup, Membership and Google Maps by Supsystic
More info and download: https://wordpress.org/plugins/contact-form-by-supsystic/