Contact
A simple contact form: name, email address, message and consent — the submissions are in the admin: Content › Forms › Submissions.
Forms
Three forms: the contact form, one with every field type and a multi-step one — in the admin: Content › Forms.
A multi-step form with a conditional step
Three steps: the middle one appears only if you ask for the newsletter in the first.
Every field type in one form
Text, numbers, choices, dates, a slider, files, an address and repeated rows in one form: every field type of the form builder except the captcha.