Ninja Form is one of the most flexible, easy-to-use form builders in the market out there. Ninja form provides a builder that is unlike any other contact form plugin. It has the following features:

• Allows seamless control over every element of the form.
• Intuitive settings and controls
• Ability to integrate with anti-spam controls like Google Recaptcha
• Effortless WordPress integration with the help of widgets, shortcodes and template functions.
• Can be easily translated to other languages.

WPForms is one of the most user-friendly WordPress contact form plugins.

It boasts of the following features:

• A drag & drop feature to create forms without coding.
• Creates high-performance forms with smart and conditional logic.
• Built-in form templates to save time.
• Instant notification
• Inbuilt SPAM protection
• Works on all devices – responsive

With help of WPForms, you can also collect the payment on your site.

Contact Form 7 is an open source plugin that allows creation and managing of multiple contact forms. Contact Form 7 has been the most popular plugin so far and is used by almost every theme.

Highlights

• In-built contextual help and documentation available in the WordPress admin area.
• Simple markup customizes the form completely
• Works seamlessly with Major WordPress themes
• The website has good community support from the developers.
• Can be fully translated into different languages.
• Allows forms to have configurable and customizable settings.

This software is completely free of cost, with no limitations offered in features once installed.