Pods Framework - Plugin and framework for adding custom fields and custom content types to WordPress.
Ultimate Member - The easiest way to create powerful online communities and beautiful user profiles with WordPress.
Carbon Fields - Carbon Fields makes it easy for you to create custom fields for post types, taxonomies,
WP-Members - WP-Members is a free membership management framework for WordPress that restricts content to...
WPforms - Drag & drop WordPress form builder
WooCommerce Memberships - Give members access to restricted content or products, for a fee or for free.