Contact Form Builder module is the easiest way to design and generate the dynamic form, you can select/drop as many fields along with the options for the controls as per your requirements and end users can post the details to submit the details to the configured email address.
The "Simple Contact Us" module provides a fully customized Contact Us form that can be use on your website. It can be configured to use CAPTCHA or reCAPTCHA for security. The module allows the website users to send messages through the website to a given configured mailing list.
DnnDeveloper's Popup module is the simplest way to setup the POPUP FORM for the Contact / Feedback / Support Request / Request call back OR show Content / HTML , image advertisement / notifications.