FSX/P3D. I can't remember if this is the same team or not but I do recall a developer working on this project a few years back and it just sort of faded away in the way many projects showcased on FSDeveloper tend to. If FSimStudios sticks with it though, they will have quite a decent addon of Toronto City for us indeed and by the looks of things, the project is at a rather advanced stage of development. No doubt, Q400 pilots will have a party on this little island. Have a look!