Formidable Forms is a WordPress form plugin that enables you to build complex forms.
Ninja Forms enables to you build forms within minutes using a simple, yet powerful drag-and-drop form builder.
Gravity Forms offers an easy-to-use tool to help you build and manage advanced web forms.
WP Fluent Forms
WP Fluent Forms is a fast, lightweight WordPress form builder that offers all the premium features.
Kali Forms is a user-friendly form builder that lets you create contact forms, payment forms, feedback forms, and more.
Tripetto provides a full-fledged form builder plugin that allows you to build conversational contact forms, surveys, quizzes, and more.