possibly....
The AMPBA currently has a program that goes from the entry stage, through frequency conflict detection, heat drawing, heat running (with automated lap-counting system) and points processing to final position output.
Plus I know of another that has similar functionality, with slightly different user interfaces (written by an individual).
We have been using lap counting buttons with audio timer countdown for years over here. There are no clubs in Aus that use a transponder system as of yet, but something similar can't be too far away for a total fuss-free event that takes much of the load off the race organisers. And with the advent of 2.4GHz, the systems are becoming easier to write.