Well, Frankie, just a quick check on Lycos came up with two products, and I didn't even go to the next page of listings! Sorry, they are not free, but less than I thought they might be.

This one will get you going for $99.00. While Foot Mouse at SafeComputing offers what looks to be a pretty extensive system for $199.00.

Could bring a whole new meaning to the term "playing footsie".*BG*

katlaughing