Flightstar does W&B. you can either select one of the many types of aircraft, to give you an idea, or create your own, for a particular aircraft. Gives you a W&B report too, with the envelope etc.
I wrote a program for the PocketPC to calculate W&B. No graphs or anything, just gives the weight and CofG position based upon your inputs and its up to the user to plot this on the graph in the POH.
Cheers
EA
