I created Super Easy Forms as an open source project and for free because I wanted to give something back to the dev community. https://supereasyforms.com/
This tool allows you to create 100% customizable html forms you can just copy and paste in your static site (no iframes)
Create an unlimited amount of forms
Store unlimited form submissions
Register an unlimited amount of emails.
Easily export submissions from the database
Also we will be adding new features like payment collecting forms, gmail api integration and others.
Thumbs up if you believe internet should be open source and free.