FormCraft Utility addon prevents users from submitting duplicate emails, duplicate input values and inline javascript and html injection. You can also select who can see the form based on the selected user roles. This plugin also allows you to add a header image to any form.
Features:
Pro Version Features * Choose any email,text field for duplicate value check. * Prevent Html,javascript injection on text field and textarea. * Choose user Role(s) to show the form. * Add banner image on top of the form.
Pro version Demo – http://wooaddons.net/formcraft-utility-addon/