Matt's Script is one of the better form handlers to use.
You can get it in PHP or CGI and it will do more or less anything you might want a form to do: form to email, form to multiple emails, autoreply and so on.
Really a lot depends on how you want to process your form(s) and what it is they are for.
Most web hosts offer simple CGI scripts for form handling, guest book, hit counter and sometimes also for a simple message board, but for feedback forms you are often limited to name, email address and comments. If that is all you want to process, see what your web host can offer you. If you want to do a bit more than this though, you will need a more comprehensive handler.
Matt's Script can be found at the UK site click here or at the main site click here
You may have to find out whether or not your web host alows you to run your own CGI scripts. If they don't and you have PHP support, you can use the PHP version of the form handler. If you host supports neither CGI nor PHP we start to get a bit complicated.
I'd check with your host first and see what they can offer you.