track flight
web based
http://www.flightexplorer.com/
http://www.flightview.com/TravelTools/default.asp
http://www.flytecomm.com/cgi-bin/trackflight
http://dps1.travelocity.com/dparrqst.ctl?Service=TRAVELOCITY

Software
AirNav
Jacars
Wacars