FSX/P3D. Our very good partner: RemoteFlight has designed some amazing apps for external ios use with FS9/FSX and P3D. I myself never leave the virtual ground without at least one of the applications running. I came across this article this morning via AustralianAviation.com.au where a local Australian university has built a very nice projection simulator using the apps for training purposes. If you have an iPad or two lying around, you must check out these apps. Very helpful and totally worth it! But damn, I really like that setup! And they got my Warthog! I'll be back, i'm going to Home Depot!