Thanks to tsaint, I tried a similar program:
eViacam, and now I have a sore neck.
It works well, accurate, has two click modes (
dwell click and
gesture click), and allows left, middle, and right mouse click as well as left mouse dragging and left mouse double click. It messes up if/while there's someone else in the camera's line of vision, though.
It was fun overall, just don't use it for more than an hour.