Jeversi Software has released a new version of AirTraffic Control. It is now available for Windows XP SP2 or better, and no longer requires DotNet to install or run. It supports up to 60 input and 16 output channels. There are no time limits or nag screens.
AirTraffic Control displays inputs and outputs as symbols on a map of your listening area. Each output acts like an ear: as inputs come closer, an output can hear them better. The circles around each output control how listening works for that output. The inner circle marks how close an input must be to hear it at full volume, and the outer circle marks how far away an input must be to become inaudible. You may adjust either threshold by dragging its circle.