I only just heard about this new app from NightRadio. It runs on PalmOS and also WinCE so I will try it out on both (time permitting).
SunVox is a small, simple, fast and powerful program for music creation, based on modular synths and tracker-like interface.
(Detailed info about music trackers is here: http://en.wikipedia.org/wiki/Tracker) SunVox is Based on parts of the PsyTexx tracker, the PsyTexxSynth engine and the SunDog engine.
As soon as I’ve had a chance to play with this I’ll post again.