I’ve used quite a fair few plugins for Contact forms, used on a large variety of applications. Until now I’d have said CForms II was the best, It was amazing, but sadly seems to have vanished.
After a look around I was pleased to find some really >REALLY< shiny website known as Gravity Forms, these guys have made what I would say, the best WordPress Plugin for Contact Forms, no questions asked, from Computer Illiterate clients to professionals, this plugin caters to all!
We currently have a Developer License which was $199, now that’s unlimited use so it’s a rather minimal fee per site, obviously the more websites you use it on the cheaper each installation equates to. Say you deploy this plugin over 1000 websites, that’s sub 20cents (13/14p) each, now that’s a bargain, and you’re still free to install it on more domains.
Visit Gravity Forms