we are working with FWZ (Flugwerkzeuge) which is the the BEST tool I ever worked with!!
The functionality of the fwz system is extensive,
Cost optimization with up-to-date CI(cost index)
City Pair Comparison
Dynamic Minimum Cost Random Routings
Delay Cost Management
Statistical evaluation tools
Exact calculation of worldwide overflight charges
Fully automatic ETOPS and EROPS handling
Integrated Ops Publications System
Weather data & interpretation
Graphical display of aircraft rotations
Charting module
Pilot Self Service module
NO I dont get any money for this...
Itīs just my opinion
cheers,
jim