Optar is a software codec that generates 2D bar codes for data storage on paper using a black and white laser printer and scanner. It fits 200kB on an A4 page, uses Golay forward error correction codes to ensure reliability, and can also be used to store data on photographic film.
foo2slx is a printer driver for printers that use the Software Imaging K.K. SLX wire protocol for their print data, such as the Lexmark C500n. This driver uses Ghostscript to perform all of the heavy lifting (image processing). There are six major components to the foo2slx printer driver.
JImageView an image viewer with no extra features. It is essentially an image display plus a menu-bar which includes the following actions: Rotate (Clockwise, Counter Clockwise, Rotate Normal); Scale (Zoom In, Zoom Out, Zoom to fit, Zoom Normal); Mirror (Flip Horizontally, Flip Vertically, Flip Normal); Fullscreen display; Slideshow mode; and Print.
Psdfposter can be used to create a large poster by building it from multple pages and/or printing it on large media. It expects as input a PS or a PDF file, printing on a single page. The output is again a PS or PDF file, which may contain multiple pages that together build the poster. The input page will be scaled to obtain the desired size. It is much like poster for Postscript files, but works with PS and PDF, since sometimes pspdfposter does not like your PS files. Psdfposter is a bash script with a Zenity GUI, and requires pspdftool.
Post Scriptum is a programming language for preparing PostScript documents and programs. The language is procedural, and uses classical control structures (functions, loops, and conditional statements) and commonly known data types (numbers, arrays, strings, and dictionaries). Its syntax is simple, clear, and easy to learn. The compiler translates programs written in Post Scriptum directly to a PostScript file, which can be than executed by a PostScript interpreter (such as Ghostscript), printed, or used as a procset, driver, or library.
PTRANS reads P5 and P6 (PGM, PPM, PNM) files, and performs Floyd-Steinberg dithering and scaling while only holding two scanlines of image data at a time. It can be used on gigapixel images while only consuming a small amount of RAM. It outputs P4 (PBM) dithered monochrome bitmap and P5 (PGM) grayscale images. It performs pixel interpolation and smoothing. Gamma correction and contrast curves may be set from the command line.
Pod::Manual is a module that gathers the pod of several Perl modules into a comprehensive manual. Its primary objective is to generate a document that can be printed, but it also allow to output the document into other formats (e.g., docbook). podmanual is a utility that uses Pod::Manual.
Bidwell (named for Shelford Bidwell, the inventor of the first true fax machine way back in the late 1800s) is a set of Perl scripts that are designed to run as a cron job on a Unix-like system to download emails from a POP3 account and send their contents to a CUPS or lpr printer.