For those of you who fly FS98 the following are MUST HAVE items.
GPS-98
Flight Planner 4.0b
With GPS-98 You can program routes or fly direct to airports and always know where you are. It displays your ETA, distance, wind speed and direction, and lots more. It also gives vital info about the airport you are flying to. It will even engage your autopilot so you don't have to remember to turn at your next waypoint.
With Flight Planner 4.0b You can plan your flights before you ever take off. It will give you your rate of climb, distance to next waypoint, rate of descent etc. It will even tell you how long it should take and the amount of fuel you should burn.