This is a page dedicated to Personal Digital Assistants. Since I only have a PalmPilot Professional, you'll probably only see links to these here.
a pure Java implementation of the PalmPilot protocol stack, along with a nice synchronization tool which supports full, compressed Palm backups, restoring of previous backups, installation of PRC and PDB files (from both your hard disk and directly from URL's), and support for plug-in jConduits (including jConduits for synchronizing with Lotus Notes under OS/2, with more jConduits on the way!), with a full free developers toolkit, all written in 100% cross-platform Java.