On the flight planning services front Sky Demon are doing a good job so far. Their subscription software (although VFR) includes route planning, vertical nav, weather input, PLOG-ing, NOTAM brief, Weight and Balance. This can all be downloaded onto the Sky Demon GPS too. I've used Sky Demon for planning and plogging and found it to be not as accurate as I'd have liked. Not used the GPS yet though.
If you fly long distance IFR go for the hefty Jetplanner program. It's an amazing piece of software that will do everything for you quickly and accurately (and probably cook a buffet lunch on board too).
I find nothing more satisfying than plotting and planning my flights in the utmost detail. Then flying them to find that they are incredibly accurate. All done by hand
