Pilot-Unix Tools
prc-tools
Tools required for building PRCs (ie, programs) for your Pilot from Unix. Requires gcc and binutils, contains patches for gcc and binutils, plus libraries, pilrc, txt2bitm and the PalmOS header files.

xcopilot
a port of the copilot Pilot emulator for windows to X

pilrc
a program for compiling pilot resources by Wes Cherry.
An X Windows port is available here as a patch against version 1.8, or as a complete tar file. It requires a recent version of the GIMP GTK+ Widget library.
Here is an updated version for PilRC 2.0a for GTK+ 1.0.x, as a patch or as a complete tar file.

pilot-link
Utilities for communicating with the pilot through its hotsync serial port from the Unix command line including a C library and various other languages
Pilot Manager
A Perl/TK "hotsync" Program for X by Bharat Mediratta
Now supported by Alan Harder
KPilot
a KDE hotsync tool, supposedly designed to be a complete replacement for the Win95 hotsync software
pi-address
Version 0.2.0
Parses the pdb for Addresses from the Pilot, includes options to print to ascii or postscript, etc