The best resource for the rapidly evolving world of Palm/Unix/Linux information is, of course, the World Wide Web.
The mother ship for distributions and various packages. pilot-link and makedoc can be found here. The page is just a long list of files with version numbers and dates.
Home of KPilot. The latest versions of KPilot may be found here. A mailing list is also available.
Home of PilotManager. Very informative site with a lot of detail about PilotManager.
Home of gnome-pilot, the PalmPilot utilities for the GNOME desktop.
Mainly a site for development tools. This site has versions of pilot-link and PalmPython; each package is followed with a mini-list of instructions on how to build and install it.
Home of Z-Doc, a freeware Doc-format file reader.
Home of Pyrite (formerly PalmPython), the extension to the Python programming language.
Home of uCLinux—Linux for the Dragonball microcontroller.