Free focused scroll is a driver for the trackpad
on Apple PowerBooks. It is an alternative to
SideTrack and an improvement upon iScroll2. It
achieves its advanced features by running the
trackpad in what is called "absolute" mode. This
means that the driver can tell exactly what part
of the pad your finger is touching. The Apple
driver (and iScroll2) both run the pad in
"relative" mode, and while that facilitates a
simpler driver because the pad does most of the
work, it is very limiting of what you can do.
