Another open source audio tracker has seen the lighe and it's called: Klystrack. This new audio tool is based on Klystron (http://code.google.com/p/klystron
This new tracker is clearly chiptune oriented and should satisfy people looking to something rather closed to AHX.
According to the developpers, "It synthesizes sounds on the fly. This allows more flexible sounds since the parameters can be changed in real time".
You can download sources right here and see for yourself: http://code.google.com/p/klystrack/
There is also a port for Amiga OS4 from our friend Spot which is available here: http://www.os4depot.net/index.php?function=showfile&file=audio/tracker/klystrack.lha
Please remember to send the tunes over to us once you've tried it.