OBDII
http://www.myscantool.com/?doc=details
http://www.obddiagnostics.com/ProgWin.html
http://www.qcontinuum.org/obdgauge/index.htm
http://www.obdii.com/obdii.html

OBDI
http://www.graphics.cornell.edu/~v/b10scan/
http://www.vwrx.com/selectmonitor/index.html

Excellent Site showing available software - commercial and free
http://www.scantool.net/?mode=displaySoftware&os=Windows%20XP


Bottom Line:
Here's the software which is provided with the hardware that I have purchased.
http://www.scantool.net/?mode=displaySoftware&software_id=39&category=ScanTool.net