After a long time there is an update of the AITA program.
This version supports FS9, FSX and P3D as long as FSUIPC is installed.
It will show you the air and ground traffic in a 40 miles radius (or less) around the user aircraft.
You can see the traffic as a list or on a radar screen. It can color the different aircraft according to their behaviour and/or destination.
You can get the setup on the download page