Magento module that makes the standard contact form send an automatic reply to the user.
This works in a way similar to the existing contact funcionality. The file at:
locale/en_US/templates/email/contact_form_autoreply.html
contains the template for the autoreply email.
To install this module simply rsync to your existing Magento insallation. Be sure to add the command --exclude=.git so you don't overwrite an existing git repository (I learned this the hard way).