Gravity Forms - Authorize.Net Add-On v1.4 for Gravity Forms v1.6.2+ | 321 KB
Gravity Forms and Authorize.Net make collecting credit card payments quick and painless! With the Authorize.Net Add-On you can capture credit card payments along with any additional data you want from the user right on your site, without sending the user to a 3rd party to complete the transaction.
DEMO:
http://www.gravityforms.com/add-ons/authorize-net/