I'm not finding anything free but here are a few that aren't too costly
here is another donkey, you have to join here too but still no mail from them.
I'll keep looking see if I can find any others
here is a free one it is just a plain donkey no frills to it but you do have to join and make sure you say thank you to the digitizer, that is all they ask of you. You never get mail from them either. but it is a great place I love it there.