Yet another mission planner in the works, i dont personally use either AP as i am creating my own.
As part of my dabblings i am creating an offline mapping tool etc for my GCS which i though might be useful to others. It's written in C# and leverages a fair few different map sources and caches the images to disk for offline use.
Needs .net 3.5 framework to run.
Right click to drag the map.
Grab it from here http://www.exsis.co.uk/MissionPlanner.zip
- and yes it is very much a work in progress (read full of bugs and missing fluff)