Desk Pilot Pro is a client-server based application that gives users shared cockpit functionality in third party aircraft for Microsoft Flight Simulator X (and then also P3D with a future update) It’s currently available on simMarket at a price of £42.06/$58.66 excluding VAT. For that price, you can fly shared cockpit with a friend who also owns a copy of Desk Pilot pro and also a compatible PMDG aircraft. The current build only supports Microsoft Flight Simulator X, and shared cockpit functionality for the PMDG Boeing 737 NGX and the PMDG Boeing 777X.