This is software for display geographical maps, written on C++. It's small and simple library, which allow to use it on PDA (like Palm and Windows Mobile) and desktop.
PiezoPower! is a fun music/noise app for your palm with a very simple and intuitive interface: you draw amplitude envelopes and frequency curves to make sounds. With IR capabilties, you can trigger sounds on other palms, or have call and response.
The Orrick MP3 project consists of a pair of applications that can
be used to build a low-cost MP3 player for the home or car. A perl
server script runs on the server PC, and a PalmOS interface application
runs on a linked Pilot or Visor.