Freshmeat page: http://freshmeat.net/projects/jpilot/?highlight=jpilot
jpilot is a full-featured desktop organizer application for the Palm Pilot that runs under Linux and UNIX. It includes support for datebooks, addresses, memos, todos, expenses, and has plugin support. It uses the GTK+ libraries.
This project has the following developers:
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!