J-Pilot

J-Pilot is an open-source GTK+-based desktop organizer for Unix-like systems written by Judd Montgomery, designed to work with Palm OS-based handheld PDAs. It uses the pilot-link libraries to communicate with Palm devices. It is released under the GNU GPL, version 2.
Linux support.
Palm does not provide a version of the software for Linux operating system, nor do they officially support the ones developed by third parties such as J-Pilot or Gnome-Pilot.