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.
Ficl (Forth inspired command language) is an ANS Forth interpreter written in C. Unlike traditional Forths, this interpreter is designed to be embedded into other systems as a command/macro/development prototype language. Ficl provides object extensions that can be used to wrap methods and structures of the host system without altering them.
Weasel Reader is an e-text reader for Palm OS. It is geared towards reading Project Gutenberg e-texts, but will work on any ASCII file. It uses zlib for compression, resulting in good file sizes, an important consideration for Palms. Weasel reads both zTXT (its own format) and PalmDoc files. It includes features such as bookmarks, annotations, categorization, searching, beaming, VFS access, and many display options. Also included is makeztxt, a command line program to generate zTXT databases. makeztxt supports regular expressions to automatically generate a list of bookmarks. Java and Perl/PHP versions of makeztxt are also available.
Plucker is an offline Web and eBook viewer for Palm OS-based handheld devices and PDAs. It comes with Unix/Linux tools and conduits, and Windows and Mac OS X conduits that let you decide exactly what part of the Web you want to view on your PDA (as long as it's in standard HTML or text format). The requested Web pages are processed, compressed, and transferred to the PDA for viewing by the Plucker viewer.
SmallBASIC is a free interpreter for BASIC, a simple computer language, targeting simplicity, mathematics, and graphics. Also, it has a powerfull string library, supports external C modules (shared libs), uses dynamic arrays (by default) and has no data types. Versions exists for Linux (or other Unix), PalmOS, DOS, Win32, VTOS (Helio), and Franklins (eBookman). It uses a lot of drivers, including svgalib, ncurses, and framebuffer.
Romeo is a tool for constructing customized Palm OS ROM images. With Romeo, you can remove unused default applications from your Palm, and install other applications in ROM to save RAM and increase their durability. Romeo can also display a great deal of information about the structure of Palm OS ROMs and PRCs.
The pilot-link suite of tools contains a robust library and a series of conduits for moving information between your desktop or workstation and your Palm handheld device, such as those made by Palm, Sony, Handspring, Handera, and others. It also includes language bindings for languages such as Perl, Python, and Java.
NetStereo is a server which runs on a computer with a sound card and plays music, primarily MP3s. What makes the NetStereo server special is that it accepts commands from remote clients. The server is written in Java, and it features the ability to plug in various methods of playing songs (currently mpg123 and the Java Media Framework) and various methods of communication (currently network and serial port). Currently available clients include a Java client which uses the Swing toolkit and a Palm client.