KSynaptics is a KDE control center module that enables users to take full
advantage of their mobiles' Synaptics touchpad. It depends on the Xorg/XFree86
synaptics driver and offers the following features:
 
  * adjustable pressure sensitivity
  * tapping configuration / smart tapping
  * mouse button emulation
  * circular scrolling
  * smart mode

WWW: http://qsynaptics.sourceforge.net/