Happyforms

As a Joomla fan I have a lot of experience with Joomla-specific form builders. Happyforms is more straightforward. And easy to use.
I find one thing less: it cannot update automatically from WordPress. You have to download the new version and install it oneach website you are using. That is not the way I am used to and therefore takes more time in maintenance and management. So 4 tacos.