https://extensions.joomla.org/extension/rsform-pro-mailchimp-integration/
MailChimp for RSForm! Pro, by RSJoomla! - Joomla Extension Directory
Create newsletter forms with RSForm!Pro for MailChimp.
joomla extensionmailchimpprorsjoomladirectory
https://www.joomla-form.com/
Joomla FORM - Free RSForm!Pro samples to download
If you need Joomla Forms created with RSForm!Pro click here to get your ready to use contact form.
joomlaformfreeprosamples