Carbon Fields - Carbon Fields makes it easy for you to create custom fields for post types, taxonomies,
Contact Form 7 - Contact Form 7 is a tool to manage multiple contact forms.
Pods Framework - Plugin and framework for adding custom fields and custom content types to WordPress.
Ninja forms - Ninja Forms is a free form creation solution for WordPress.
WPforms - Drag & drop WordPress form builder
Ultimate Member - The easiest way to create powerful online communities and beautiful user profiles with WordPress.