This page is a list of external applications that interface with the wacom driver in one way or another.
Magick Rotation is a Python GTK app. that supports automatic rotation for Dell, HP, and Lenovo tablet PCs. It's located on Launchpad at: https://launchpad.net/magick-rotation
The xinput_calibrator is a generic touchscreen calibration program for X.Org. It's located at freedesktop.org: http://www.freedesktop.org/wiki/Software/xinput_calibrator