I have spent weeks, trying, purchasing, requesting support and returning various form tools trying to get one to work with your HighEnd theme. I have to think that I am not the only one out there who uses your theme that wants on-line forms. The major problem has to do with CSS conflicts causing the forms not to display properly, and features not to work. Multiple vendors have pushed the problem back onto the Theme. Finally I was able to get FormCraft to work with some CSS updates that they provided.
I love the popup support of forms that FormCraft provides. However, my preference is for Formidable, as it supports longer more complex forms. It would be great if you would directly work with one or more vendors to insure compatibility and possible inclusion.
Further, I would suggest that you create a certified app program, where app builders would go through a certification process to insure that their apps work with your themes, which would save your users many hours of frustration in working with your theme and app incompatibilities.
Finally, it would be nice to be able to change the default contact form to support an external form.