Flight Planner is one of major improvement achieved by FSX.
Universal Avionics Systems Corporation
Allows you to perform offline GPS FDE predictions for remote/oceanic operations.
Aerosoft Flight Calculator does all the calculations you need during your flight.
Traffic X is an add-on for users of Microsoft Flight Simulator FSX.
All your favorite Flight Sim sites are all a click or two away!
Just Flight Ltd
VLJ Business Jet is an add-on for users of MS Flight Simulator FSX or FS2004.
Creates realistic flight plans that can directly be used in flight simulation.
Champagne PC Services
Flight Planner 3000 is a program which produces detailed, accurate flight plans.
Garmin Ltd or its subsidiaries
Transfers flight plans from your computer to the flight plan data card.
Access nearly all the information about planes, flight plans, controllers around.
Dirk Trinkaus, Henning Hülsebusch
Obtain valid flight plans for pilots and route administrators.
This permits exchanging flight plans, user waypoints and navigation data.
It allows you to create a database of your flight plans routine.