CaptainForms

The best and I am repeating that just in case. I have gone through so much trouble with so many other plugins until I finally found out that the Captain forms are what I was looking for all this time.
I am using the Hero version that allows you to creat unlimited number of forms. I could not be happier. The forms are sparking clean in terms of design. There are so many options to configure your forms based on whatever you want the forms to do.
You get centralized form depository that you can flash on as many sites as you want , without having to redesign them again.
But most of all to me is how nicely the forms are configured to work with SMTP servers.
I used to lose so many form submissions because I was using a form plus an standalone SMTP client but with captainforms you get a seamless integration of these two in one package without any gap to be worried about.
I think the Captain forms are much better than Gravityforms, Ninaj Forms, and Contact Form 7 in different ways. You just need to try them side by side to get what I mean. Those forms have created a dispersed ecosystem which requires parallel and stack on installation of other Addons with a price, with Captain forms you have it all in one package.