Pilot-Link - Command-line tools for connecting to a Palm to sync, add, delete, move, copy, and manipulate Palm data.
pilot2pine - Converts Palm address book to Pine format.
Pyrite - A Python library which provides high-level object-oriented access to Palm handhelds and their data.
Syncal - Syncal reads a current ical calendar file, an archived ical calendar file from the last time syncal was run, and a Palm device DateBook database and reconciles them.