f/Calc is a utility to calculate lens formulae for photographers so you can focus on the artistic bits rather than on the mathematics behind it all. f/Calc can do "f" number arithmetic, and can calculate depth of field, hyperfocal distance, the field of view of a lens, the angle of view of a lens, magnification, and how the focal length of the lens on the camera changes the way the spot metering function works. In addition to the Unix/Linux Tcl/Tk version, there are native Windows, Palm OS, and Macintosh versions as well.
The par utility creates and manipulates PalmOS database (.pdb) and resource (.prc) files. Par is designed to be a Swiss army knife for managing these files. It's a command line tool, and not for the faint of heart, but it's very handy and replaces a bunch of little utilities that you might otherwise use.
Studycard Studio Lite is a program to create and memorize multimedia flashcards, tests, and tutorials, including picture and sound identification. It is meant for educators, students, or anyone who has something to memorize. Students can create and study their own flashcards and track their progress. Educators can create quizzes or flashcards for their students.
USB-TCP Bridge bridges communications between a Palm handheld connected with a USB cradle and a TCP/IP socket. It can be used, for example, with the GDB debugger (which normally connects to the Palm OS Emulator on TCP/IP port 2000) to debug on a Palm handheld instead of debugging on the Palm OS emulator. It can also be used to connect the Unix-based pilot-link synchronization tools to a Palm handheld on Mac OS X. There are many more features, like support for packaged redistribution with predefined settings, etc.
LlamaXML is a C++ XML parsing and formatting library that is small enough to be used on handheld devices like PDAs and smartphones, while still supporting larger desktop and server systems. The library currently runs on Palm OS Garnet, Palm OS Cobalt, Windows Mobile, Windows, and Mac OS X, and is easy to port to new platforms. The entire library compiles to only 45 KB of code under Codewarrior for Palm OS, and can be even smaller if only some of its features are used. The library is also frugal with runtime memory, using a single-pass streaming algorithm that only stores the current parsing stack in memory, allowing very large XML documents to be parsed with very little overhead.