DaggerWare's HackMaster: The original, it created the concept of hacks; think of it as a control panel for PalmOS system extensions. [Shareware

J-Pilot: Unix desktop organizer, modeled after the Palm Desktop, with hotsync functionality

PilotManager: Tool for synchronizing Unix desktop applications and data with Palms

X-Master: A free compatible Hackmaster replacement. Offers technical and user interface improvements