OpenFlash Performance - ECU tuningOpenFlash Performance | ECU tuning
This looks like TuneEcu but for Porsche with the draw back that it is only for 987/997 at the moment, it's not free, and is married to one car at a time.
I know the benefits of TunECU and have used it for years. I wanted the same for the 986. I'm sure if there is enough demand they would do 986 versions.